I don't know much about these, so I'm guessing they are handmade by one person and at least 50 years old, by their look. They are entirely wood.
The three sizes are:
Small: clamps are 7" by 1 1/8" by 1 1/8." Screws are 5 1/2" long with 2 1/2" handles.
Medium: clamps are 8" by 1 3/8" by 1 3/8." Screws are 6 1/2" long with 3" handles; the two handles are different.
Large: clamps are 10" by 1 1/2" by 1 1/2." Screws are 10 1/2" long with 3 1//2" handles; the two handles are different.
Condition is excellent for their age. Of course there is wear, but they all work. They would be a beautiful display.
These are being sold together. If you only want one, please send me a message.
For additional vintage items, please visit our shop, The Maine Attic.
https://www.etsy.com/shop/TheMaineAttic?ref=seller-platform-mcnav store
Product code: Three Vintage Wooden Furniture store Clamps