copo ring and pinion gears

[enio45]

Does the BE/copo SERVICE REPLACEMENT 4:10 ring and pinion gears have the (actually the ring gear) part number and dated stamped on the mounting side vs the edge of the ring gear?

[scuncio]

I have 1975 dated gears with the codes on the flange surface. Assume it's the same for any 12 bolt gears of that era.

[enio45]

Tony, so im clear, flange surface is the mounting surface - correct?