Yes I've got a guess! But that's all it is on your item but may help a little as it looks like it could be some kind of tool piece to me maybe dental,or surgical But I'll show you what it remined me of when I saw it.And that is this navigational tool I found at a late 1700's site.Maybe it will help with some ideas for yours.It sure does look like something I've seen before but can't put my finger on it
Take Care! British Army Navigation Tools During Revoluntionary War