Thought I would post this up for everybody's reference. Maybe a mod would like to archive it?

I saved this from the FC list earlier this year. Credit should go where credit is due, so thanks John Z.

RX-7 86-88 (8/85 - 12/88)
JM1 FC 33 1 * G 0 ######
JM1= Mazda Passenger Car
FC = RX7 Series
33= Coupe
35= Convertible
1= 1308cc 13B rotary non-turbo
2= 1308cc 13B rotary turbo
*= Check Digit
G= 1986
H= 1987
J= 1988
0= Hiroshima Plant
######= Serial Number

RX-7 89-91 (12/88 - 7/91)
JM1 FC 331 * K 0 ######
JM1= Mazda Passenger Car
FC= RX7 Coupe
33= Coupe
35= Convertible
1= 1308cc rotary non-turbo
2= 1308cc rotary turbo
331= Coupe w/auto shoulder belt
332= Coupe Turbo w/auto shoulder belt
333= Coupe w/o auto shoulder belt
334= Coupe turbo w/o auto shoulder belt
351= Convertible w/o airbag
352= Convertible w/ airbag
*= Check Digit
K= 1989
L= 1990
M= 1991
0= Hiroshima Plant
######= Serial number

Build dates by serial number:
Model year-----Production Date----Serial Number
1986--------------8/85 - 6/86------100001-200000
1987--------------6/86 - 7/87------500001-600000
1988-------------7/87 - 12/88-----600001-700000
1989------------12/88 - 12/89-----700001-800000
1990------------12/89 - 11-90-----800001-900000
1991--------------8/90 - 7/91------900001-950000