Question for the experts, I have several Ordinance gages some of which are marked for the M1, others for M1 M1C and still others for the M1 M1C M1D. Do the different markings denote a general time frame when the gage was issued?
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Ordinance Gage Markings
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While not specific some gauges may have been marked just for the M1 and without knowing which drawing numbers are on the gage or tool it is hard to determine if the gage is early or late. Any gage referencing the M1C or D would be very late WWII or post war. Most likely post war. The M1C and D were not added to the SNL until Jan and Feb 1945 so I would expect to see gages marked sometime after that. Since there is no real difference in the gages unless a significant revision was made or a tool like the lock tightener wrench that was modified for the high hump, I expect that there were plenty of tools/gages in the inventory until the late 40's (rebuild timeframe) or the onset of the Korean war. I have several gages too and I am always interested to see unusual items, etc. Probably not a definitive answer but hopefully it helps somewhat.
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Definitely helps as it confirms my understanding that anything with M1C or M1D would be post war. I was just thinking that without those two referenced it would be earlier but it makes sense that they might just denote the M1 on gages if no other changes were made to the specs. I've attached a photo of three ring gages that I have. I believe they are in order of age from left to right but I'm pretty much guessing with my limited knowledge.1 Photo
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From the information available, I believe A.O. Niedner made the first Model 1903 rifle conversion to 22 rim fire before he moved to Dowagia, Mich in 1920. He converted the original bolt to rim fire and made a extractor housing on top of the bolt (rifle is worth 6K) will attempt to post photo or else I will send it to you.
I can't down load the photo so I will send it to you by email
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