Valuation · updated July 2026 · live listings + documented auction results
How much is a Cartier London Tank J.J.C. Allongée worth?
As of July 2026, the Cartier London Tank J.J.C. Allongée LOT has 1 documented auction result; the record is $735,000 (Sotheby's Hong Kong, 2026); the Cartier cohort on the MEW Price Index is -0.01% since tracking began (2026-05-30); no live-listing sample currently meets our minimum for a market band.
Full London Tank J.J.C. Allongée dossier Set a price alert All valuations
How this valuation works
The live band is computed from in-stock listings matched to this reference across our tracked merchants (asking prices, not offers). The auction band is from documented, primary-sourced results in the Record Ledger corpus. The trend is the brand cohort's movement on the repeat-listing Price Index — tracked since 2026-05-30, honestly labeled, never extrapolated. Cite as “MostExpensiveWatches Valuation”.