Vacheron Constantin 82172 (Pre-owned - Good) — USD 17,100 on eBay

The Patrimony Contemporaine Bi-Retrograde reference 82172 represents Vacheron Constantin's interpretation of retrograde complications within the Patrimony Contemporaine series. This reference distinguishes itself through its bi-retrograde function, offering dual retrograde displays on the dial face. The watch features a 42.5mm case crafted in 18k rose gold with a fixed bezel configuration. A silver dial sits beneath sapphire crystal, while an automatic movement powers the complications. The case offers 30 meters of water resistance, positioning it for dress watch applications rather than sports usage. Reference 82172 appeals to collectors seeking complicated dress watches with traditional precious metal construction. The 42.5mm case size accommodates contemporary sizing preferences while the rose gold case material and silver dial combination provides classical color coordination. The bi-retrograde complication adds mechanical interest beyond standard time display functions, targeting collectors who appreciate visible complications in formal timepieces.