************************************************************* THE HAMMOND AGE DETERMINATION LIST - APRIL 1997 ************************************************************* The idea is to help Hammond organ owners to be able to pinpoint the approximate manufacturing age of their gear. The longer the list grows, the more exact picture we will get. If you know the date of your organ/leslie from some OTHER source than the checklist below, then please send me some info - look to the questions at the bottom of this text. Generally, the organ date can be bracketed into 4 years, (55-59, 60-63, 63-68, 69-74) as each of these year groups has a definite sound caused by Hammond component changes. An organ today however, is unlikely to sound like these as such, since it will have degraded over the years. (1) Bevis Peters http://www.phys.ucl.ac.uk/~bp/hammonds/hammond.html ************************************************************* HAMMOND ORGANS ************************************************************* (CO = Country of Origin - US and UK models had a different sn system) (ACC = ACCuracy of info - see below) MODEL CO SERIAL YEAR ACC SUBMITTED BY EMAIL ADDRESS ===== == ====== ===== ==== ================ ============================== A UK 2542 1937 ** Claude Schmit claude.schmit@syknet.be US 126 1935 ** Bill Kostok bkostok@cyberenet.net 1587 1937 ** Wild Bill ModelA31A@aol.com ----- -- ------ ----- ---- ---------------- ------------------------------ A100 UK 3780 1964 *** Keith Burberry burberry@wfp.unicc.org 4175 1965 ** Bevis Peters bevis@apg.ph.ucl.ac.uk (dark wal) 42176 1965 *** Wilhelm Koenig Wilhelm.Koenig@oen.siemens.de 42564 1965 *** Lauritz lauritza@alpha.barentsnett.no 232109 1973 *** Bevis Peters bevis@apg.ph.ucl.ac.uk (rosewood) US 2687 1960 ** Dean Marines hubble@gvi.net 3374 1962 ** Steve "Red" Wierenga SWiere1024@aol.com (mahogany) 9695 1962 ** Steve Leigh stleigh@ibm.net 10765 1961 ***! Bevis Peters bevis@apg.ph.ucl.ac.uk (light wal) 14155 1963 ** scylla scylla@surfari.net 18443 1963 *** John Hodgkinson Hodgkinson@labatt.com (mahogany) (A105) 25725 1963 *** Tim Hodges THodges142@aol.com 30698 1964 * Steve Czarnecki stevecz@cruzio.com 36803 1964 ** Barry Foster 73417.3240@CompuServe.COM 36960 1964 ** Rick Prevallet RickP@Solve.Net (walnut) 38817 1964 ** Maury Stauffer STAUFFER@mv3100.bsr.com 41597 1966 ** Bryant Holinaty bryant@merge1.mergetel.com 42038 1965 ** Steve Sorenson SSoren9001@aol.com ----- -- ------ ----- ---- ---------------- ------------------------------ BC US 4737 1937 ** Scott E. Shuster SEShuster@juno.com 5575 1937 ** Forrest Radley radley@magick.net UK 90 1937 ** Bevis Peters bevis@apg.ph.ucl.ac.uk ----- -- ------ ----- ---- ---------------- ------------------------------ B3 US 56428 1955 *** Sal Azz SalAzz@aol.com 60418 1956 ** Jyrki Sippola jyrki.sippola@benefon.fi 63209 1956 *** Sal Azz SalAzz@aol.com 66649 1957 * Don Brager dbrager@ix17.ix.netcom.com 69470 1957 ** Rene' Bressieux Rbressie@dshs.wa.gov 73327 1958 ** Michael Wolk mwolk@awod.com 74238 1958 *** Tim Hodges THodges142@aol.com 74790 1962 **! Nick Vincent nathforg@cct.infi.net 80041 1962 **! George Fish Jr GeoFishJr@aol.com 80685 1959 *! Tom Ericsson 100732.2151@compuserve.com 81355 1961 ** Peter Bremy grenz@warwick.net 82364 1962 ** Steve Leigh stleigh@ibm.net 83737 1960 **! Treshell Black inphase@cco.net 86080 1962 * PhreNeTiK rcardina@erc.cat.syr.edu 86484 1962 *** Bt1955 bt1955@aol.com 86909 1962 *** Sal Azz SalAzz@aol.com 88107 1963 * hecjda@ccnet.com 88191 1963 *** David Jacques djacques@post.smu.edu 88201 1963 *** Mark Austin l301@hotmail.com 88773 1963 *** Hartwig Mueller Hartw.Mueller@t-online.de 90110 1963 ** b3nut@madison.tdsnet.com 94715 1965 *** Sal Azz SalAzz@aol.com B68699 1970 *** Sal Azz SalAzz@aol.com 90482 1970 ** Sal Azz SalAzz@aol.com 98410 1967 **! Tim Hodges THodges142@aol.com 99631 1971 ** Tim Hodges THodges142@aol.com 100367 1968 **! Pete Cage Pete_Cage@HP-USA-OM11.om.hp.com C121210 1971 ** Rick Prevallet RickP@Solve.Net D176126 1972 *** Sal Azz SalAzz@aol.com D196744 1972 *** J. Day jon@axionet.com 100007 1963 *! L. Zane Gill zanegill@intele.net 328255 1970s * Steve Marth stephenm@halcyon.com E226306 1973 *** Steve Leigh stleigh@ibm.net E238537 1973 ** Steve Beach swbeach@worldchat.com 311906 1973 *** Matti Adolfsen matti.adolfsen@aol.llaky.fi FR 92073 1964 *** Keith Burberry burberry@wfp.unicc.org ----- -- ------ ----- ---- ---------------- ------------------------------ CV US 11747 1946 * Rick Prevallet RickP@Solve.Net 13174 1947 ** Rick Prevallet RickP@Solve.Net 13201 1945 *! Marc Mercier mercierm@bose.com 26751 1949 *! Rick Ruggiero r_ruggiero@global2000.net 28521 1948 * Dave McClellan drm@atl.hp.com 30219 1949 ** Rick Prevallet RickP@Solve.Net ----- -- ------ ----- ---- ---------------- ------------------------------ C2 US 51563 1954 *** Jeffrey Arnold hecjda@ccnet.com ----- -- ------ ----- ---- ---------------- ------------------------------ C3 UK 00002 1955 *** Bevis Peters bevis@apg.ph.ucl.ac.uk (2) 94489 1966 *** Lauritz Arntzen lauritza@alpha.barentsnett.no 238251 1972 ** Lauritz Arntzen lauritza@alpha.barentsnett.no US 59229 1956 ** Rick Prevallet RickP@Solve.Net 66196 1957 *** Ian Wayne Futurballa@aol.com 70050 1957 *** Pete Cage Pete_Cage@HPATC1.hp.atl.com 70332 1958 *** Sal Azz SalAzz@aol.com 79355 1958 ** Jack Barakitis jackb@highway1.com 80735 1959 ** John Hodgkinson Hodgkinson@labatt.com 86190 1960 ** Olaf Schjelderup Olaf.Schjelderup@uninett.no 86588 1962 ** Michael Leik meleik@ix.netcom.com 87457 1962 ** Rick Prevallet RickP@Solve.Net 90466 1963 *** Rick Prevallet RickP@Solve.Net 91728 1963 *** Keith Burberry burberry@wfp.unicc.org 92760 1964 ** Sal Azz SalAzz@aol.com 93791 1968 ** A. B. Bonds ab@vuse.vanderbilt.edu 96866 1968 ** A. B. Bonds ab@vuse.vanderbilt.edu 97131 1968 ** A. B. Bonds ab@vuse.vanderbilt.edu ----- -- ------ ----- ---- ---------------- ------------------------------ RT2 US 2607 1955 *** Rosanne Tarantolo rosannet@earthlink.net ----- -- ------ ----- ---- ---------------- ------------------------------ RT3 US 6349 1967 * Bill Morton wjm@speed.net (cherry) ----- -- ------ ----- ---- ---------------- ------------------------------ D US 5900 1942 *** Thom Day day@rs6000.ivcc.edu ----- -- ------ ----- ---- ---------------- ------------------------------ E US 8161 1937 ** Marc Mercier mercierm@bose.com CA N113 1937 ** Adrianne Schutt hmmm@northcom.net ----- -- ------ ----- ---- ---------------- ------------------------------ H100 US 16296 1967 *** Jeffrey Montanari jandp@tiac.net B93471 1970 *** Matthew L Reed emberts@compuserve.com B60834 1970 ** John Gieseking CudaJG@aol.com (H182 with TC) ----- -- ------ ----- ---- ---------------- ------------------------------ L100 SW 93494 1968 ** Peter Dyfvelsten etxpdn@solsta.ks.etx.ericsson.se US 69094 1965 *** Matti Adolfsen matti.adolfsen@aol.llaky.fi L100P BE 69274 1968 * Petri Olenius petri.olenius@halmstad.mail.telia.com ----- -- ------ ----- ---- ---------------- ------------------------------ L202S B 111234 1970 ** J-P Palmulaakso juhpalmu@polaris.utu.fi ----- -- ------ ----- ---- ---------------- ------------------------------ M2 US 45573 1954 *** Mike Brewes MIKEB@EINSTEIN.UNIPISSING.CA ----- -- ------ ----- ---- ---------------- ------------------------------ M3 US 56116 1955 *** Steve Sorenson SSoren9001@aol.com 67044 1957 *! George Fish Jr. GeoFishJr@aol.com 73034 1954 ** Andre Bisson andrebis@endirect.qc.ca 85010 1955 * Costa Kostadinov costa@clark.net 105141 1958 * Wim Rijnsburger rijnsburger@ecn.nl 129827 1959 ** Paul Ruxton ruxtonp@halsp.hitachi.com 130238 1959 ** Rick Prevallet RickP@Solve.Net ----- -- ------ ----- ---- ---------------- ------------------------------ M103 US 23440 1967 ** Steve Sorenson SSoren9001@aol.com M103 31099 1964 ***! Hartwig Mueller Hartw.Mueller@t-online.de M102 UK 48768 1965 ** David Neal david@neal.u-net.com M102 76834 1966 * Bjorn Skoglund Bjosko@Cybernet.dk M102A 77710 1967 *** Bevis Peters bevis@apg.ph.ucl.ac.uk M102 82351 1968 *** Keith Burberry burberry@wfp.unicc.org M111 EU S32790 1961 * edtsilj@memo.ericsson.se ----- -- ------ ----- ---- ---------------- ------------------------------ S US 2814 1955 * George Fish Jr. GeoFishJr@aol.com ----- -- ------ ----- ---- ---------------- ------------------------------ T522 BE 251409 1973 * Petri Olenius petri.olenius@halmstad.mail.telia.com T212 CA 41169 1969 ** Bryant Holinaty bryant@merge1.mergetel.com ----- -- ------ ----- ---- ---------------- ------------------------------ JR20 US 79417 1957 ** Ian Wayne Futurballa@aol.com ===== == ====== ===== ==== ================ ============================== *=not sure about year **=pretty sure about the year ***=year confirmed !=indicates possible discrepancies NOTE: We already can see some discrepancies in age approximation. We'll try to clear these up as the list grows. ************************************************************* AGE DETERMINATION HELPS ************************************************************* This chapter is still very much in the works as you can see. Please correct me if you find something's wrong. I welcome all your input about age determination methods. In Jan 1955, B3 and C3 serial numbers started at 56000 (in the US). They ran consecutivly to around 103000 in 1968, when Hammond changed to a different system. (3) In 1969, Hammond used a letter prefix followed by a number inclusive of _all_ organs; A for '69, B for '70 etc. (3) Organs manufactured outside the USA may not follow this, however. MODEL FEATURE MANUFACTURING YEAR ======= ============================== ============================ A/B/C keyboard cheekblocks -1959 wooden checkblocks (2) 1960- black plastic ------------------------------ ---------------------------- C/D quatrefoils on console & bench 1939-1959 (4) ------------------------------ ---------------------------- B/C/RT round vibrato knob 1946-1961 (3) small HAMMOND logo 1935-1966 (3) non-ratchet drawbars 1950 (4) pilot light 1961 (2) ------------------------------ ---------------------------- C3/B3 A0-28 preamp transformer -1962 silver (2) A100/RT3 1963- black (2) D100 ------------------------------ ---------------------------- vibrato line box frame -1955 silver wooden 1955-1957 painted black (3) 1958- open metal frame ------------------------------ ---------------------------- tonewheel generator RC network 1965- (3) ------------------------------ ---------------------------- engraved harmonics on drawbars 1969- (3) A ------------------------------ ---------------------------- A100 Necklace reverb -1959 (3) ======= ============================== ============================ Contributed by: (1) Al Goff, from previous email communications (2) Clive Botterill (3) Sal Azz (4) Hans Wehner ************************************************************* LESLIE SPEAKERS ************************************************************* MODEL CO SERIAL YEAR ACC SUBMITTED BY EMAIL ADDRESS ===== == ====== ==== === ================= ============================== 122 US 24983 1963 ** Rick Prevallet RickP@Solve.Net US 30831 1971 * Tim Hodges THodges142@aol.com (122R US 44822 1962 ** George Fish Jr. GeoFishJr@aol.com US 53555 1974 * Peta Cage Pete_Cage@HP-USA-OM11.om.hp.com (122A US 7055955 1991 ** Tom Ericsson 100732.2151@compuserve.com US H00629 1970 ** Michael Wolk mwolk@awod.com (CBS Leslie) US H17189 1971 ** Rick Prevallet RickP@Solve.Net US H54294 1973 ** Steve Leigh stleigh@ibm.neSteve Leight US H54296 1973 ** Steve Leigh stleigh@ibm.net US H54326 1973 *** Steve Leigh stleigh@ibm.net ----- -- ------ ---- --- ----------------- ------------------------------ 125 US 17476 1967 ** Steve Sorenson SSoren9001@aol.com ----- -- ------ ---- --- ----------------- ------------------------------ 145 SW 67340 1968 ** Peter Dyfvelsten etxpdn@solsta.ks.etx.ericsson.se US 63695 1965 ** David Chertock ap412@lafn.org US 71901 1973 ** Harvey Olsen HOlsen5629@aol.com ----- -- ------ ---- --- ----------------- ------------------------------ 147 US 10620 1972 ** Bjorn Skoglund Bjosko@Cybernet.dk US 86183 1969 ** Rick Prevallet RickP@Solve.Net DA FB11098 1972 ** Wilhelm Koenig Wilhelm.Koenig@oen.siemens.de ----- -- ------ ---- --- ----------------- ------------------------------ 45 US 53238 1960 *** Jeffrey Montanari JandP@TIAC.net 47 US 82607 1962 *** Steve Sorenson 104045.3454@CompuServe.COM ----- -- ------ ---- --- ----------------- ------------------------------ 31H US 4565 1954 * Jeffrey Arnold hecjda@ccnet.com US 6988 1956 ** Tim Wick tbw@research.westlaw.com ----- -- ------ ---- --- ----------------- ------------------------------ 25 US 1522 1959 ** Rick Prevallet RickP@Solve.Net ----- -- ------ ---- --- ----------------- ------------------------------ 760 US 61853 1974 *** Rick Prevallet RickP@Solve.Net ===== == ====== ==== === ================= ============================== *=not sure about year **=pretty sure about the year ***=year confirmed (from SalAzz:) Inside each Leslie on the lower shelf is a date code (sometimes hidden by the 15" speaker). Here's how it works: You have to be able to date the Leslie within 10 years, which should be fairly easy. Just to get started, 21H's are 1950's, 22 series is 1956 to 1963, 122/142/147/145's are late 1963 and later. Any other single speed model (45/47/51) is prior to late 1963. There are a number of visual cues: Anything with a foil CBS ID tag is post 1966, anything with a metal tag is prior to 1966. The typewritten silver foil tags appeared in the mid to late 70's. The new style Leslie logo appeared in 1970, and cabinets made after then have particle board baffles rather than all hardwood construction and are missing the instruction sheet formerly pasted to the back. The code is 4 digits. The first 3 numbers are the day, and the last digit is the year. For example, model 142 serial #B15324 has 2317 stamped on the baffle which means it was made on the 231st day of 1967. INFO QUESTIONS: Please answer these as best you can when sending in info: For A100/C3/B3: Are the Keyboard Cheeckblocks wooden or plastic? Is the big transformer on the A0-28 preamp silver or black? Is the vibrato box (on the left of the manuals from the back) black, wooden silver or open metal? Does the tone generator have an RC network on the lower notes? Are the harmonics (16', 8' etc) engraved on the drawbars? For A100 also: Is there a necklace or spring reverb? For all: What is the model? Which country is it from? What is the serial number? What is the date? How do you know that it _is_ that date? (bill of sale etc) Send it to bevis@apg.ph.ucl.ac.uk Thanks very much.

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