Protractor?

[Sidcane]

Me and Beardogs were hunting a late 1700s to early 1800s site and we're hammering nails ( pun intended)in an iron infested area. Beardogs got his whizzer and first reale (1776)that day. I was going through my nails and spikes I had dug that day and came across an unusual nail. I was in such a hurry to bag the nails that day that I just assumed I knew what it was. It looked to be silver so I cleaned it . Now it looks like a silver protractor. Any guesses? The thinner side is missing...looked but didn't see it in my stuff.
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[Sidcane]

Me and Beardogs were hunting a late 1700s to early 1800s site and we're hammering nails ( pun intended)in an iron infested area. Beardogs got his whizzer and first reale (1776)that day. I was going through my nails and spikes I had dug that day and came across an unusual nail. I was in such a hurry to bag the nails that day that I just assumed I knew what it was. It looked to be silver so I cleaned it . Now it looks like a silver protractor. Any guesses? The thinner side is missing...looked but didn't see it in my stuff.
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I put a picture of the Nick in the side of the stem to show that it was the same color on the inside as it was on the surface.

 

[ToddsPoint]

That’s called a compass or dividers. Neat find.

 

[pa plateau hiker]

That’s called a compass or dividers. Neat find.

You beat me to it. I guess I shouldn't have slept in so late this morning.

 

[oldmxrat]

Way better than just another nail!

 

[E-Trac-Ohio]

Very nice !