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What are Lot Number But No Serial Number Parts


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What is a lot numbered part?:

 

https://www.gunbroker.com/Item/799849369

 

I seem to recall something about non-serial numbered MP40 bolts that were replacement bolts. Is that what a lot numbered part is, or what was the practice during the war era if a part needed replacing?

 

Thanks,

 

Robert

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This one has the codes applied by the manufacturer, but no serial number, as you can see. The small sunburst stamp shows that this barrel was sent back for correction or rework. The presence of three inspection WaA marks show that it eventually passed inspections and was accepted. The large eagle on the barrel shank is the firing proof. Right, I'd go with the "armorer's spare" theory, too, since Steyr commonly seral numbered barrels used in regular series production.

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MP-40 barrel production codes:
= Bohler.
Stg = Possibly Steyer. This code has been observed with a number, like Stg 74, Stg 76, Stg 80. Probably the number is a steel lot number.

Kur = Steyr Daimler Puch A.G., after 1941.
ar = Mauser Werke. Berlin-Borsigwald.

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Mine is stg marked

 

Show a pic of the seg?

See the 5th picture in the GB link in OP above. I guess that's an SEG.

Looking at that pic again i believe it is a STG and not SEG. It is a lowercase t with part of the t cut off.

Bingo! The stg stamping die broke and continued to be used.

Edited by TSMGguy
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