PATEK PHILIPPE. A FINE 18K GOLD LIMITED EDITION WRISTWATCH WITH BREGUET NUMERALS, MADE TO COMMEMORATE THE 150TH ANNIVERSARY OF PATEK PHILIPPE

In 1989 Patek Philippe made 2200 pieces of this watch to commemorate the firm's 150th Anniversary. Of those, 2000 were cased in yellow gold. The reference 3960's design was influenced by the first wristwatches of the early 20th century with a rounded bezel. The design of the reference 3960 features an officer-style case back that, when opened, reveals the 150th anniversary engraving and movement number.