Crotal bell

In Europe they were probably made from before the early Middle Ages; though many founders cast bells of this type, the Robert Wells bell foundry of Aldbourne, Wiltshire, produced the largest range.

On smaller vehicles, they were hung on a small leather-and-iron harness bracket above the horse's collar; on larger vehicles, such as delivery wagons, they were driven into the wooden frame of the wagon.

The National Museum of Ireland and the British Museum have several examples on display dating from the late Bronze Age which were found in the Dowris Hoard, alongside various brass wind instruments.

These are bronze cylinders in the rough shape of a teardrop, with a piece of baked clay or a pebble inside.

[2] Media related to Crotal bells at Wikimedia Commons