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martin08,

Once again, Thanks for your information. The ColtForum topic was a wealth of information. I have narrowed the date down to 2nd Qtr. 1918, probably early May.
My aim was to try and...

martin08,

Thank you very much for your evaluation and explanations.
Regarding the date of manufacture, I could only narrow it down to 1918-1919 from online sources. I notice your October 1918...

martin08,

THANK YOU for your post and information.
Here are additional images.

GS38

BD,

Thanks for the reply. I don't recall ever seeing a number stamped along side the "UNITED STATES PROPERTY" stamp under the barrel. Have you? And haven't ever noticed that tiny Ordnance stamp...

I have a Colt 1917 with three sets of serial numbers.
The Colt SN is on the frame inside the crane, on the crane itself and inside the side plate.
The U.S. Army No. is on the bottom the grip frame....