Anybody know what this is?

It's an early version of a Doo-Dad.
Some might identify it as a Thingamajig, but that would be incorrect.
Thingamajigs weren't produced before April 1st 1951.
And that item in the photo is much older than that.
And it's definitely not a Gee-Gaw.
Gee-Gaws were first introduced as an option on the 64 1/2 Mustang first unveiled at the World's Fair in New York on April 17th, 1964.

You're close it's a primitive Whatchamacallit.
Probably a hold down tool for Circumcision.