Gold Filled Octagon Shaped Locket on Chain

Gold filled locket.
Bright metal color.
Marked CLB Co. ?
Has engraved design on one side.
Smooth on other side.
Opens from the bottom.
Makes audible snap when closed.
Interior has no celluloid.
Chain measures approximately 18 inches.
Locket measures approximately 1 3/8ths by 1 3/8ths.