What type of Bell is this?

[VTSwinger]

I've familiar with crotal bells but I haven't seen anything like this before.

 

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[Fourman110]

Shattered Crotal.

 

[ANTIQUARIAN]

Looks to be made of tombac metal, which tended to be brittle and broke easily.
This was likely attached to a string of bells that hung around the horses neck.

"Tombac, as it is spelled in French, or tombak, is a brass alloy with high copper content and 5—20% zinc content. Tin, lead or arsenic may be added for colouration.
It is a cheap malleable alloy mainly used for medals, ornament, decoration and some munitions. In older use, the term may apply to brass alloy with a zinc content as high as 28—35%."

Dave

 

[CRUSADER]

Might be a carriage bell.