AH is a beetle transaxle code.
Most likely IRS and most likely pre 1973.
Around 1973..late 1972?... they went to a number system
that represented the day-month-year of manufacture,
and this one does not match that.
The AH trans did go into the 'date code time zone',
but when the 3.875 crownwheel and pinion was available the letters became AT.
AH has 4.125 diff ratio, and 0.883 fourth gear.
It most likely has a bronze fork for 1st and 2nd.
I have seen a swingaxle trans with an AH case
but its history was unknown, and was probably an IRS converted back to swing.
Those part numbers are from the engine case halves of a bus as Phil has indicated.
westi wrote:That's mad Alan.