P14, Pattern 1914. Sporterized.
This is after several years of my memory so don't take it as gospel....
Brits needed more rifles in WWI, couldn't make no.1 mk3's fast enough, so Winchester and Eddystone tooled up to make P14's for them. 5 round internal box mag, .303 british. Mauser style action that's cock-on-close.
Round about 1917, the US gets involved and realizes they need more rifles yesterday. Since Winchester, Eddystone, and Remington are already tooled up to make P14's, they simply changed the rifles to .30-06 and started cranking them out. The American .30-06 rifles are M1917's. Because the box mag was set up for the big rim on the .303 originally, 6 .30-06 rounds will fit in the M1917 magazine. I want to say more M1917's made it to France than M1903's in WWI. There was serious discussion following the war to replace the M1903 altogether but it didn't go anywhere. Post-war, Remington used up remaining parts in Model 30 production.
Anyway, OP, collector value goes to pot once someone chops the stock and refinishes it.
What it used to look like:
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