🔎 UNIDENTIFIED What is this Small Item found in old homesite

[PenguinDetectsCA]

Hello treasurenet,
I found this small copper/brass thing in a early 1900s property. It says "25". What could it be?

 

[AU Seeker]

It appears to possibly be some type of rivet

 

[creskol]

It looks like an older saddle blanket pad number from a communal tack room / livery stable.

 

[xr7ator]

Shame that penny doesn't have the D instead of the S.

 

[PenguinDetectsCA]

It looks like an older saddle blanket pad number from a communal tack room / livery stable.

Huh, I've never heard of that---could you put a picture example? I searched on Google and didn't find anything. Thanks.