I did find this. Based on this, Eddystone produced 604,941 rifles between 1916 and 1917.

Based on the serial number on my rifle (on the way from a GB purchase, (503xxx)), it looks like it would have been made in mid to late 1917. Quoting from your source: 'By the time production at the three plants ended in July 1917, Eddystone had produced 604,941 P-14s, Remington had produced 403,126 P-14s, and Winchester had produced 235,448 for a total of 1,243,515.' 'Production of the Pattern 1914 rifle ended at Eddystone with the delivery of their final rifle on June 1, 1917'. (Reference C.S Ferris, United States Rifle Model of 1917 page 9.) Based on that, rifle #503xxx would likely have been made in the first quarter of 1917.

Does anyone know a good source for date of manufacture of Pattern 14 Enfields? I recently purchased a Pattern 14 303 Enfield made by Remington, serial number 60510 and would like to know when it was made.. Free Download Program Aspekte Mittelstufe Deutsch B2 Pdf Reader. I've got 2 Enfield rifles' numbers and I wonder if they BOTH belong to a 1914 pattern model.

The UK Pattern 1913, Pattern 1914, and the US Model of 1917; A Short History of the “American Enfield” By Marc Gorelick Virginia Gun Collector’s Association.