KD ratchet set

[jimwrench]

 I suppose these little ratchet sets are common as dirt but I don't recall seeing them before. Had two at auction last night and I didn't really compete on second one after winning first one (one token bid). Anyway one question. They are stamped Kd 24,Kd 22, and Kd 21. The half inch size which would be KD 23 is not stamped. Why not? All are stamped ( Made in United States of America pat appl for) so I believe the 1/2 size is original part of set. Anyone know when they were made ?

[Lostmind]

That's a coincidence , I just used mine about 20 minutes before coming on line.
I was thinking " I wonder if any one has a set of these"? No joke
I've had them since the 70's , I think. Maybe a little later.
The tool pouch is long gone. I used them a lot under the dash, until metric came along.
They still work well and show little wear. Surprising for a cheap specialty tool.