Couple of stamps on 29-2 grip frame...

[D1911]

I recently picked up a mint 6 1/2" blued 29-2 that actually looks unfired. I pulled the grips and noticed a couple of stamps on the right side of the grip frame and was wondering what they meant. The first is an "F" in a circle, the second is an "H" in a circle. Any ideas? Thanks.

[diamonback68]

Inspectors stamps.
Others like an F6 would mean employee 6 of the F team helped fit your gun.