This turning out to be a fun one .
I have a different (slightly) idea about this bell .
Could you post more images with the motif (designs) of the bell , Kaytbell ?
I've magnified & minimized the image you've posted , and for the life of me I can't discern what's exactly on it .... I really think there are clues there .
Where I'm leaning towards is a 'clear' bell ( sorta like a calling bell ) from an archery range .
Keep in mind that this is an old half-blind guy sayin' this ....