According to John Walter's book on Stanley Tools....
"In 1893, Stanley Rule and Level acquired the tool division of the Upson Nut
Company, a division of the Standard Rule Co., both
of Unionville,CT."  (page 80 of Walter's book)
Walter lists the average price of the #68 Stanley rule at $5-$25 with the
exception being a rare Type 1 marked "A. Stanley & Co." priced at $400-$800.
and the metric version priced at $100-$250.  Versions made of teak instead
of boxwood go for $500-$1500. and later types have vertical figures.
(all of the above is from page 535 of John Walter's book)
The #68 is listed as a "carpenter's rule".

I have seen a couple of  Upson Nut rules and they were priced very low so I
assume they are not rare....
especially since I came across them....   :-)  I don't how rare your
particular rule would be....

Don
Allen, TX

> 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