Norm:

I don't know the answer yet, but I'll look. I was chasing brand/tradenames when I found the Cumberland Steel Company. The Crucible Steel Company of America( http://www.crumetals.com/steelworkers.cfm ) is really the key as of July 1900 it was incorporated and looks to have the following under its unbrella:
http://books.google.com/books?id=k_kMAAA...yracuse&lr= .

In 1888, the company was listed in Pittsburgh with the works in Cumberland, Alleghany county, Maryland - http://books.google.com/books?id=wi0qAAA...lt&resnum=1 . They made tools steel and under the Crucible Steel Company of America there is a slight possiblity they made tube steel.

Kind Regards,

Raimey
rse