I got this Allen USA socket set for cheap (see below - there are also a few extensions/spark plug sockets/handles/allen keys in the case cover). It seems practically unused. I can't find any information on these ratchets/sockets. They seem pretty nice quality. Any idea how old is this set?
Danaher made NAPA tools in the late 90's and 2000's I think, and I know Armstrong was being sold by NAPA after Danaher bought Armstrong and NAPA was branded on Armstrong tools