Hello. I started this thread and have always wondered how my "South Africa" 38 S&W has no additional proof markings.

My letter from S&W says it was shipped May 3, 1940 and delivered to South Africa. My serial number 685267 makes it a close neighbor to LOBO's 685147 in this thread
Pre-Victory model .38 S&W 6".....South African contract I believe

Has any new information been discovered about how it is not proofed in any way by South Africa or Britain?