I bought a bell, a good loud call you for dinner, wake the neighbors up in case of fire, neat looking bell!
Heavy brass (I assume.) It currently has a fishing weight as a clapper, and a lamp part as a actuator.
Looks like it was cut off of something, and that it used to hook to something on top.
Looks a bit like the bells the school teachers supervising the elementary school playground used to ring when recess was over.
Before electronic everything took over!
It's definitely a bell. About 6 inches across and heavy, as well as a lovely tone. Not a hand bell. I'm thinking it was mounted someplace like a boat. Hoping someone will recognize it, even though it's been cut off and modified.
My guess would be farm, school, or fishing/ smallish ship's bell - as you said, a call 'em to dinner (or in from recess, or gitcherbuttmovin', before we sink!) bell.
"The only thing...more expensive than education is ignorance."~Ben Franklin. "We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light." ~ Plato