If this one is out there, must be others. Too many stamps to count. Dozens of them in all orientations....and at least 2 different sized fonts. And I count 5 properly oriented stamps on the back side too. A die trial cymbal? Or a guy in the factory having some fun? Pretty cool. Without precisely measuring the stamps, I'd say it's both large and small stamps all mixed up. The 50's small stamp is very clear in some places. The larger stamp is very fine and weakly impressed....like a 70's small stamp....no 3 dots either....and on at least one of them no "MADE IN USA." Some others have that bottom line. I'm not very familiar with a no 3 dot 50's large stamp - it doesn't quite look like that. Only seen ones with 3 dots. There is the "H over E" and "C over N" letter alignment on the larger Font.