I believe this is an M1 Garand .30-06. That would make the image sometime from the 1930s. The M1 was produced from 1934-1957. No other information available. Found in a thrift market in Fayetteville, Arkansas.
These were part of a large set of “postcards”. Actually, they have blank, gray backs. Possibly a collector’s set of cards? Dunno. This jet-powered strategic bomber was produced from 1956–1961. So, whatever this “card” is, they had to be released somewhere around that time. Here is the Wiki page of this aircraft. Quite an interesting history.
The words “AF Museum” are found on the back of this old photograph. Air Force would be the only explanation that comes to mind. Would like to say this is a 1950s image but it can’t be verified. Found in a thrift store in Rogers, Arkansas.