Inscription: M. Mavroidi, 1868/Alelxandie (engraved script, on back of circle)
Marking: [1] F S in a diamond - unidentified maker (see image)
[2] eagle's head (Paris restricted warranty mark for gold, 1847 to date)
[3] K 3724
Location of marks:
[1]: on hook for pin
[2]: on pin and on rim of brooch near hook
[3]: stamped in center of back
