I've had this awhile, and all this talk about vintage tools got me thinking about it. I PM'd Snaparxon, and with the part number he was able to track it to a 1933 Snappy catalog. Didn't know I had such an oldster among my work tools! I like it because it's long, thin, and has 3 sizes on it (3/16", 1/4", and 11/32") - the latter two are quite common in my line of work.
It has a 7- stamped on it - could that be a year (1937?)