The Perpetual Calendar3940J 18K Yellow Gold Silver Dial FIRST SERIES (Reference 3940J) is a Yellow gold cased luxury wristwatch by Patek Philippe introduced in 1987. The case measures 36 mmmm. Powered by a Automatic movement.

On TheWatchInfo, the Perpetual Calendar3940J 18K Yellow Gold Silver Dial FIRST SERIES is tracked across the secondary market in real time. There are currently 1 active listing. Listings are sourced from Dealer. Price history, trend analysis, and condition breakdowns are available on this page.

Patek Philippe watches are among the most actively traded on the pre-owned market. The Perpetual Calendar3940J 18K Yellow Gold Silver Dial FIRST SERIES Ref. 3940J is sought after by collectors for its yellow gold case construction and automatic movement. Buyers and sellers use TheWatchInfo to track real-time price movements, compare listings across platforms, and understand fair market value before transacting.

When purchasing a pre-owned Perpetual Calendar3940J 18K Yellow Gold Silver Dial FIRST SERIES Ref. 3940J, key factors to consider include the condition grade (unworn, mint, excellent, good), presence of original box and papers, service history, and whether the watch has been modified. Prices for examples with full box and papers typically command a 10–20% premium over card-only or watch-only examples. Use the listings and price history on this page to benchmark what a fair price looks like right now.