Additional Information: In early 1943, International Silver requested to eliminate
prime contractor markings from the oilers. Two valid reasons were cited:
- 1) So many
oilers and magazines were being made that it was a burden to keep them separated
-
2) A quick response to increased demand would be easier if all oilers were marked
the same so that not all different oilers needed to be stocked at one time.
From
this point on (or shortly thereafter), all oilers were marked “IS” only.