I thought the same thing about the ways. It doesn't seem likely that a cheaply made vise would have dovetailed ways.
Although the paint job undercuts that assertion somewhat.
Outlaw: I've had the swivel base version of that clamp on for years and I never did identify it. I'd sure be glad if someone on this thread knew for certain what it was.
colmal: Here is a cut from a 1930 catalogue showing the IMP. It also includes the patent number (In my head I read that with a long "A" sound). It may help with researching IMP clones. Good luck!
Welcome. I'm partial to Yost myself but there have been few complaints about Columbians. Beerhippie was right. It depends on how you plan to use them. If you have followed this thread you'd know that the real response would be, "Keep them both".
I just posted this on the main vise thread (#96414).
To help avoid confusion, the information should probably be on the Vise Info thread too.
Armstrong Manufacturing and Armstrong Brothers are not related.
However, they both produced pipe vises and pipe wrenches.
As an illustration of how vise information can get tangled (and mangled):
Armstrong Manufacturing and Armstrong Brothers are not related.
However, they both produced pipe vises and pipe wrenches (shifters).
colmal: The shifter in your LOCK vice photo looks like one of the Armstrong Brothers...
The 1882 Vandergrift pipe vise patent was assigned to Frank Armstrong of Armstrong Manufacturing Company.
That $329 postage is not looking quite so bad now, eh?