What is it

[bartshop62]

I found This in a early 1900s motel tht is now demolished and is now a Park. is it Modern or old what is it how old is it what century was it made? Its The size of a us quarter.

 

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[jeff of pa]

I Had a Watch with Something Similar in the 70's

 

[Al D]

It is a jam nut, used on electrical conduit

 

[Charlie P. (NY)]

Yep. Romex, not Rolex. ;-)

 

[Older The Better]

Yep been seeing a lot of those lately replacing electrical panels