ID Frame Only??

Dwight,

The possibility of find separate parts that have the same machining finish is very small even when produced on the same machine at a different time of the same day.

Each part machined reduces the fine edge of a cutter.

This results in a small if hardly perceptable degrading of the finish until the surface finish reaches a point that the operator or the line inspector orders a change in tooling for the offending machine.

In the time period that these weapons were manufactured, Tool life was much shorter than today.

The milling cutters sometime required changing as often as every two dozen parts or so depending on the amount of metal that was removed.

I hope that this answers some of your questions allong this line.

ViggoG