These are probably the last, or almost the last, iteration of instructions for the venerable Winchester Model 12 shotgun. They are pre-1962 because there is no 5-digit zip code. Olin-Mathieson was used beginning about 1955. The outline motif for Winchester model numbers is from the 1950s, so I'm calling it c. 1960. Condition is excellent, as shown. 9" x 4.125". Includes an archival viewing envelope. Shipping is to USA ONLY. No foreign sales.