JF Stamp On Scant Stock?

[Punch the Clown]

I was cleaning up one of my stocks and found an RA-P and a large JF. I know what the RA-P is but am curious about the JF. Google has a couple of hits on other stocks with the same stamp but no answers.

http://i369.photobucket.com/albums/oo140/Stumedic/ScantStock01_zpseb47dcdb.jpg (http://s369.photobucket.com/user/Stumedic/media/ScantStock01_zpseb47dcdb.jpg.html)