🔎 UNIDENTIFIED Mystery button

[SweatyPotato47]

Please help with identification
I found this yesterday while beach detecting. I already posted about this, but here are some new photos after cleaning

 

Amazon Forum Fav 👍

A Handbook of Civil War Bullets and Cartridges - Grab it through Amazon!

[CRUSADER]

Looks like cheap modern pot metal, rather than old pewter, so early 1900s.