Dwight, Power proofing for DWMs I believe was done at Spandau, not at DWM. That is my impression from Gortz and Bryans. This could explain how an Erfurt style imperial eagle stamp came into use at some point. Spandau would not have had a vested interest in the eagke style. Although they seemed to continue using the DWM style on the frame. I wonder if the barrel proof stamp was slightly curved to accomodate the rather tight radius of the barrel?
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