...A lot of times they're the ones I reach for because even a boxed end wrench has two different sizes like a half inch on one end and 9/16 on the other end,.....
One of my favorite wrenches is a 1/2 & 9/16 box wrench that's about 4 inches long. It's a Tiger tools brand made by Vlchek in the late 30's-early 40's
pic. I think I stole it from my dad. I also picked up a BOBW (big old box wrench) that was hanging in dad's garage the last time I was down visiting mom. It's a Wilpen brand 1" and 15/16" manufactured by Plomb Tool in the early 30's
pic. Haven't used it but other than some surface rust it looks to be in good shape. It's just a wall hanger.
As far as what to look for, IMO are US made Craftsman sockets and such.