✅ SOLVED strange FOB buckle slide thing ?

[Squirrel322]

Dug this tonight at an otherwise uneventful sidewalk tear out.

 

[nhbenz]

1/2 of a Victorian sash buckle. Kind of a neat/different one than the usual floral ones that often show up, which are also cool, just different.

 

[Squirrel322]

You are correct. Thank you for the ID.
I found some photos online that show how the two pieces would have worked.