Can anyone give me any info on my rearend #'s

PO 0702G

It did not appear there was anything after the G,
but it was hard enough get the numbers I got.

These numbers are stamped on the front of the pass side axle tube.

Thanks

PO = 1967 3.07 Posi with metallic brakes.
0702 = July 2nd
G = Detroit Gear & Axle

There also might another letter just beneath that line of text.

I'm not 100% that's the only one for "PO" though.

In 69, PO is 3.08 open.