Only 1 pic, but cant figure this one out

[Zrxrunner]

Any ideas, fellas? Doesn't look like a factory makers stamp, but only thing I see on it is challenge or challenger across the top. If it gets tighter as it spins down, appears it would have to be a splitter or separator of some sort instead of a press in.

 

[slowtwitch73]

Letterpress Expansion Lock​

 

[crguy]

Called a Quoin. Challenge.

 

[larry_g]

​

any ideas, fellas? Doesn't look like a factory makers stamp, but only thing I see on it is challenge or challenger across the top. If it gets tighter as it spins down, appears it would have to be a splitter or separator of some sort instead of a press in.

Letterpress Expansion Lock​

I have a pair of those in my tool box and have been using them for machinist jacks on the milling machine. I'm glad to know what they really are.

lg
no neat sig line

 

[RTM]

Called a Quoin. Challenge.

Hmmm, never heard of them til now.

Pardon Our Interruption...

www.ebay.com

 

[crguy]

Hmmm, never heard of them til now.

Pardon Our Interruption...

www.ebay.com

I'm familiar with letterpress printing. Challenge made all kinds of printing equipment.