Very unusual vintage gimmick!
This is a set - one signet style gimmicked ring with a matching regular ring.
This very useful gimmicked ring lets you link any borrowed ring to it.The effect is that you linked the borrowed ring to your ordinary signet ring.
The gimmicked ring is the no-fuss style, with a cut out on the band.Very easy and very visual!
CONDITION: excellent- never used. RINGS ARE ABOUT A SIZE 10.5.SEE PHOTO.