Chanel Collection 28 Large Magnifying Glass Pendant Long Chain Necklace. From 1992. 

Magnifying glass pendant frame is a smooth border with "CHANEL PARIS" letters in bold and two six-pointed stars north and south. 

Measures 30 inches at longest; can be detached or doubled

Condition: Good, there is wear on the clasp hook area and silvering (but only on the ends) - see photos; priced accordingly