18kt Gold "Perpetual Portuguese Calendar" Wristwatch, IWC Schaffhausen

Description:

18kt Gold "Perpetual Portuguese Calendar" Wristwatch, IWC Schaffhausen, the silvered dial with Arabic numeral indicators with four subsidiary dials for day in English combined with seconds, date combined with seven-day power reserve indication, month and moon-phases, aperture for year display, enclosing a 64-jewel automatic movement, display back case, 44 mm, no. 2920234, completed by a black strap with deployant buckle, boxed with papers.
Estimate $10,000-15,000

Minor wear with use, currently running, all functions appear to be in working order.