Re: Bill, the frame on my 1914 Erfurt artillery has no "grind" line...
Hi John,
Looked again at my 1914 Artillery and it has a very slight ridge just below the serial number, as did the majority of the Erfurt 4 inch guns in the later years. These are not competely round, but there is a line when tipped just right and you can actually feel it with your finger. These are not anything like the very pronounced lines on the DWM 1917's and 1918's. The rails on the 1914 Erfurt stuck out enough that your fingernail would catch it, and when tipped upright, you could see that they were not perfectly flush, but protruded outwards just slightly. I think these are all just normal production traits with just different tolerances.
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