jorda04: If you post a couple of photos showing key markings (top of receiver ring, for ex.) the resident experts can probably tell you a lot. You may already have found out the P14 was only manufactured by one of three US factories during, I believe, 1916/1917. I have a new book on foreign contract rifles made in US up to WW1 that lists monthly production figures at the three factories which I'd be glad to look yours up in.
Ridolpho