Age Determination List 1.02

[Tom Ericsson <100732.2151@compuserve.com>]

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THE HAMMOND AGE DETERMINATION LIST - REV. 1.02 - DEC 05, 1995
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This list is compiled by Tom Ericsson, 100732.2151@compuserve.com.

--------------------------------------------------------------------
NOTE: Due to lack of input, the list has not been touched since the
      last issue. I'm sending it again in case somebody wants to 
      contribute with new input....
--------------------------------------------------------------------

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, so PLEASE KEEP SENDING IN YOUR 
INFORMATIONS, even if you know the age of your gear!

I will eventually open up a WWW homepage to make the list readily 
available and we will include a pointer to it from the Groove's 
homepage. If you don't want your name and email added to the list, 
please tell me so.

I would like to receive informations that help in determining a 
Hammond organ's age! Your input is welcome!

Tom Ericsson
868110000-C1



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HAMMOND ORGANS
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MODEL CO SERIAL YEAR  QUAL SUBMITTED BY     EMAIL ADDRESS
===== == ====== ===== ==== ================ ==============================
A100  US   4175 1965  **   Bevis Peters     bevis@apg.ph.ucl.ac.uk
----- -- ------ ----- ---- ---------------- ------------------------------
BC    US   5575 1937  **   Forrest Radley   radley@magick.net
----- -- ------ ----- ---- ---------------- ------------------------------
B-3   US  80041 1962  **!  George Fish Jr   GeoFishJr@aol.com
          80685 1959  *!   Tom Ericsson     100732.2151@compuserve.com 
          86080 1962  *    PhreNeTiK        rcardina@erc.cat.syr.edu
          86484 1962  ***  Bt1955           bt1955@aol.com
         328255 1970s *    Steve Marth      stephenm@halcyon.com  
----- -- ------ ----- ---- ---------------- ------------------------------
C-3   US  70050 1961  ***  Pete Cage        Pete_Cage@HPATC1.hp.atl.com
          90466 1963  ***  Rick Prevallet   RickP@Tyrell.Net
----- -- ------ ----- ---- ---------------- ------------------------------
M102A US  77710 1967  ***  Bevis Peters     bevis@apg.ph.ucl.ac.uk
----- -- ------ ----- ---- ---------------- ------------------------------
M-3   US  67044 1957  *!   George Fish Jr.  GeoFishJr@aol.com
         105141 1955  *!   Wim Rijnsburger  rijnsburger@ecn.nl
----- -- ------ ----- ---- ---------------- ------------------------------
S     US   2814 1955  *    George Fish Jr.  GeoFishJr@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.


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AGE DETERMINATION HELPS  
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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. 


MODEL   FEATURE                       MANUFACTURING YEAR
======= ============================== ============================
B-3     keyboard cheekblocks           ?-1963 wooden checkblocks  ?
C-3?                                   1964-? black plastic       ?
A-100?  ------------------------------ ----------------------------
        A0-28 preamp transformer       ?-1961  silver             ? 
                                       1962-?  black              ?
        ------------------------------ ----------------------------
        vibrato line box frame         1955-1956 painted black      (1)
                                       1957-1961 silver wooden      (1)
                                       1962-?    open metal frame ?
        ------------------------------ ----------------------------
        tonewheel generator R/C network >1964                                   
        ------------------------------ ----------------------------
        engraved harmonics on drawbars ?
======= ============================== ============================

Contributed by:
(1) Al Goff, from previous email communications
                               

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LESLIE SPEAKERS
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MODEL  SERIAL YEAR  QUAL SUBMITTED BY      EMAIL ADDRESS
===== ======= ===== ==== ================= ==============================
122R    44822  1962 **   George Fish Jr.   GeoFishJr@aol.com
122A  7055955  1991 **   Tom Ericsson      100732.2151@compuserve.com 
147     86183     ? *    Rick Prevallet    RickP@Tyrell.Net
===== ======= ===== ==== ================= ==============================

*=not sure about year  **=pretty sure about the year  ***=year confirmed