antique bowling medal

item is mounted on or attached to a leather strap. at the top of the strap is a clasp like they use on jewelry. I assume it was worn on the shirt of the bowler. the medallion is slightly larger around than a half dollar. it depicts a bowler in motion on an alley and you can see the ball return in the background . at the bottom there is a design with what i assume is the bowlers first initial and last name engraved. it has what i believe to be a small diamond chip on the right side ; on the back it is engraved with the words "winner 1923 tournament five men 2823. i believe that clasp and hangers may be brass and the medallion gold.