unknown tool?

This was found in a barn-it has two moveable claws and a stationary middle piece-can't figure out what it could be--HELP

Picture of unknown tool?
Its a Blacksmith's Double Caliper. you would use one side for width and the other side for thickness
mh76dk4 years ago
I found that if you look for "Blacksmith's calipers" some very similiar ones come up, including: http://www.homemadetools.net/blacksmiths-calipers The site also seems to have an active forum, they might be able to help you?

Looks like measurement calipers for something, but I don't know what