The 17 and 18 diamonds of old Beijing watches are collectible, depending on personal preference. On the whole, however, the old Beijing watch II 17 diamonds are more worthy of collection.

1. old Beijing watch type II 17 diamond is an early type II watch. It is meticulously crafted, engraved on the splint, and the outline of the door opening in Tiananmen Square on the watch ear and case is clearly described. It was made earlier and has great collection significance.

2. The second type 18 diamond of old Beijing watch is based on 17 diamond, and a gem bearing is added to the middle splint. There is no lettering on the splint, and the outline of Tiananmen Gate on the ear and case is not as clear as that of 17 diamond, and the collection significance is not as big as that of 17 diamond.