This vintage clock part is a 6-3/16" HR No. 70-706-03 convex round crystal from Japan. It is an original and licensed reproduction with the brand HR. The material used to make this crystal is glass and it is suitable for all types of clocks.

The antique value of this clock part is not known, but it is in excellent condition and is new old stock. It is perfect for clock enthusiasts and collectors who are looking for replacement parts and tools.