C17 and 4x8x6 ??

[40BOY]

What does this mean on a 28-2?

Stamped on the the crane of a gun on Gunbroker

 

[diamonback68]

They are fitters, assemblers ans inspectors marks and have no meaning once they leave the factory.

 

[john traveler]

All those numbers in the crane and frame cutout are "assembly numbers" used to match up the crane, frame, and sideplate since they receive final polishing together before the finish is applied.

 

[SmithNut]

I thought they were Axtecan date codes indicating when the forcing cone is supposed to crack from the use of +P+ ammo??