The panel says this gun was the first to shoot in the Aberdeen Proving Ground after it has been founded in 1908.
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Rear view. The breech is an interruped screw breech, very different from the classical Krupp et Rheinmetall breechblocks.
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Breech markings : "3 inch US - FIELD - Model 1902". Sur Carriage : "Nr 124 - Model of 1902 - RHEINISCHE M.W. A.M. FABRIK - 1904"
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