Seth Thomas 1904 Adamantine clock

This is my great grandfather's clock, probably, that I would like to price. It is a 1904 Seth Thomas mantel clock.

It has brass feet, etchings, face, lions on each side holding a brass ring, and a green marble look top.

There are no pillars on the front - instead it has ornate brass sconce looking decorations.

The clock is in excellent condition. Can anyone place a value on it?