Echo the comments above for me. I have a little 3/8" set of 70's era SK that is my favorite rachet and sockets, better than US Craftsman of that era. I have some Proto adjustable wrenches that are way better than Crescent US ever were. Just this weekend, at a garage sale, for only $22, I picked up 3 snap on sockets, 5 huge Proto ones (1/2 and 3/4 drive, 1" plus sizes), some Wright sockets, lots of Fleet (Proto value brand I understand), and lots of Indestro US sockets, and a couple Williams and Bonney there too. A set of 15 Mustang US brand there as well. About 40 in all, all US made! I can't wait to try out the Snap on and others above. These are my first ever Snap on tools! I got 3 sockets! Woo Hoo! But those Protos and Wrights above are likely just as good. Also thrown in for that same price were two vintage US Crescent Channelock type wrenches, two more US Crescent 8" wrenches, and a Utica 10" pliers without much use. What a super deal. Buy old vintage US if you can find it, whoever made it, and you are not likely to go wrong.
Modern or new, Proto or SK are both premium brands. Wright is great too. I'm super happy SK is still around, as I am about Enderes, Vaughan, Estwing, and other premium US brands. Buy 'em all whenever you can if you can afford them and revitalize US manufacturing and quality.
Aside, anyone know much about Thorsen? Got a Thorsen socket too, but not labeled as to COO. Wondering if that is another US socket or not and info there... - Paul