Since DWM didn't waste completed parts, they continued to use the unrelieved sear bars until they ran out of them. There can be an overlap of serial numbers. I have two 1916 DWMs, and one has the unrelieved sear; the other the relieved sear.
Marc
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 Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.
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