Picked this up at a local thrift store today for $4. Metal case made in Japan. Says Distributed by: inter/national sales Co Redford, Ohio. Judging by the car, metal case, and pre china manufacturing I would say sometime in the early 70s. Not a metric socket in the bunch. How strange it must have been for some Japanese man manufacturing and stamping a socket set in some completely foreign system of measurement.
It's the standard version of that damn 10mm. I swear I have bought a small toolbox of each over the years and will randomly find one laying around and toss it back in the drawer
