This will be fun...
You mention 1969... but those were MODELyear 1970
That's why none were build in '76... they're all late 1975 (and thus modelyear 1976)
AFAIK, the modelyear changes in october
Now it will be fun mix and match #'s that were actually build within a year (january through december) or how many were build for that modelyear (which would have the corresponding VIN#)
Here's the listing from the Brian Long book...
1970 model year - 914/4 - 13.312
1970 model year - 914/6 - 2.657
1971 model year - 914/4 - 16.231
1971 model year - 914/6 - 432
1972 model year - 914/4 - 21.580
1972 model year - 914/6 - 229
1973 model year - 914/4 - 27.660
1974 model year - 914/4 - 21.370
1975 model year - 914/4 - 11.369
1976 model year - 914/4 - 4.075
total /4 115.597
total /6 3.318
grand total 118.915
The totals are pretty close, but look how the #'s per year differ
cheers,
Jeroen
(will check the Johnson book when I find it...)