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Old 05-11-2021, 03:01 PM
krdomingue krdomingue is offline
Join Date: Nov 2015
Location: Katy, TX
Posts: 1,496

Just to expound a little. Each depot had their own way of marking stocks that went through rebuilds. The P in a square are proof marks used by only two of them. San Antonino Arsenal and the Red River Arsenal.
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