^ Patent 1438900 = New Britain Machine, New Britain, CT.
http://www.datamp.org/patents/displayPatent.php?id=52379
The sockets are of decent quality, for what they are. The "sandwich" ratchet will work provided you don't put a piece of pipe on the end of it - that will tear it apart. (I've received a couple from Ebay that were broken open on the business end from over-torquing them.)
Those sets were stamped out by the millions by a number of manufacturers and
usually marketed and sold to "the handyman around the house".
I don't think I'd be trying to change out a set of head gaskets or install headers on a 390 Ford with a set of those, but fixing the kid's bicycle or wagon or the toaster would be easily accomplished.
Similar type of deal - smaller and made by a different manufacturer:
Best thing is probably to dust it off, put it on a shelf, and enjoy its intrinsic value as a vintage US-made tool kit.