The reverse side displays a repeating IMM monogram pattern across the surface, adding texture and authenticity to the piece. The marking “.999 fine silver” suggests high purity, though the piece has been acid tested and shows a dark red reaction consistent with sterling silver (.925).
The design captures the dual-lens structure and central bridge, giving it a recognizable and functional appearance despite its small size. This charm is stamped “STER” and has been acid tested, showing a dark red reaction in the photos indicating sterling silver (.925) content.