Did they make handmade protactors?

[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.
.I put a pic of the nick in the side to show it was the same color as the surface.

 

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[vpnavy]

...came across an unusual nai...Now it looks like a silver protractor. Any guesses? The thinner side is missing...looked but didn't see it in my stuf...

I moved ya from TODAY'S FINDS! over to WHAT IS IT? for more exposure.

NOTE: Forum TODAY'S FINDS! contains your find(s). Share it with others in the Today's Finds Forum. Always a "timely" place to visit.

Also, You forgot to attach a picture.

 

[dognose]

Could you please post a few clear images?