This Innocent World pocket watch style necklace from 2006 was formerly missing the mirror back, but I finally found it and was able to reattach it! Please note the small blue marks on the back of the pendant-- hence the low price-- but they're not too noticeable.

The pendant and chain are both heavier than typical costume jewelry, and high quality like all of Innocent World's jewelry used to be-- very similar to the quality of old Jane Marple jewelry. Originally priced at ¥7,245. 

Pendant height: 2.5"
Pendant width: 2"
Color: Antique silver tone