Well, I missed out on that one! What I have is a Whitney, Imperial 7 1/2 but it looks pretty much the same with rust.
I just sent off E-mails to Roper Whitney,
Roper Whitney - Quality Sheet Metal Fabrication Equipment
W.A. Whitney,
Whitney - The Leader in Plate Technology (laser cutting machines, plasma cutting machines and hydraulic punching)
and Cleveland Punch,
Cleveland Punch & Die
The punch is skuffed up to the point I can't tell if it's a W.A. or a Roper Whitney but I figure they'll know one of their own. Cleveland punch has a long list of companies they make dies for.
On the other hand I can buy one from Horrible Fright for $20 + SandH and hang the antique on the wall.
It works but the 1/4" die in it is dinged and I don't want to damage it further unless I'm replacing them for a good set.
Frosty