Today I bought a four fold rule. It looks just like a Stanley #68,
except it is marked "Upson Nut Co." and "No. 68."Is this a promotional
piece for "Upson" or were they a rule maker? I bought it to throw into
my swap meet kit since I often want a rule and haven't been carrying
one. BUT, if this rule has any value beyond measuring, I would like to
know before I put it at risk.

Thanks,

Bill