95% or better around 1200 to 1500
1911
1914
Early 1920.
Manufactured 1914
1919
1920
Late 1911
The Remington model 12C slide action 22cal. was produced from 1909-1936.
1915
1924, see related links
eBay has reproduction manuals on occasion. Keyword Remington Model 12 and it should take you where you need to look.
1925, It's date code stamped - check related links for information on the Remington Society of America