I've tried looking these up in the 'old' Mag FAQ but can't find them.  I can't connect to the new Mag FAQ (Is it up?).  Does anyone know about quality?  They're 30 rnds.  On the floorplate, they have Kay Industries, Inc. with a circle both around the letter 'K' and another circle around the word 'Kay'.  Below that is New Britain, Conn. U.S.A.  No markings on the body and made of aluminum.  

try looking for Okay...  they are GI mags.

Hi! Those are Okay mags. They're USGI and the equal of any other maker of USGI mags.

Sometimes I can be dense.  So the 'circle' is actually the letter 'O', so it's 'Okay'.  Gotcha.  I'm permasilking and replacing the springs/followers on the two mags.  Thanks for the info guys.