Very nice find :)
The wings put the vintage close to papaw's display boards, but thay box was available to the hardware stores for quite a broad period of time. If you want to know the date more closely, you can probably work it out by compariung the retail prices written on the parts sheet with catalogs, most of the catalogs also had a parts page....
(The jaws are interesting, they are only chrome plated on the polished surfaces...hmm)