That looks like the kind of set they used to give out at gas stations after you earned enough "points". My first auto set was very similar to yours although I suspect much newer than that one. My dad got it at a Gulf station and gave it to me when I got my first car.
The smaller hex drive sockets look identical to the small sockets in my set, which came in a larger red steel box along with a 1/2" square drive ratchet wrench and a bunch of sockets. The 1/2" drive set was marked "Fleet". They had a rather dull gray finish but were almost indestructible. On more than one occasion I either used ny feet for extra force or a pipe cheater but the ratchet never broke.
As I recall my set came with a couple of worthless screwdrivers and some other stuff that all eventually got discarded other than the socket sets.
More than likely your ratchet and some of the sockets were made by a USA manufacturer and left unbranded as promotional giveaways by a gas station or hardware chain. That's how it was done in the days before such cheap goods migrated to China. It's possible the Made in Japan ones were bought later as replacements for lost or broken ones.
