Cartier Lover's Knot Gas Pipe Choker
From the seller: "A Tubogaz chocker necklace by Cartier in 18k yellow gold and steel. The loops at each end forming a clasp with the button set with an oval Citrine".
Vinzenz's Christmas gift to Carmen in December 1957, as a way of symbolizing their reunion, as well as Carmen's recommitting to him...this time, as his collared submissive.
The particular design of this necklace allows Carmen to attach a bugged listening device (disguised as a brooch).