IWC REF. 3540 INGENIEUR PERPETUAL
CALENDAR MOON PHASES YELLOW GOLD
International Watch Co., Schaffhausen, "Ingénieur Perpétuel," No.
2485694, Ref. 3540-1. Made in the 1990's.
Very fine, tonneau-shaped, center seconds, self-winding, water-
resistant, 18K yellow gold wristwatch with perpetual calendar,
moon phases and an 18K yellow gold IWC buckle. Accompanied by
Certificate of Origin and guarantee (blank), additional year calendar
insert, hang-tag and instruction pamphlet.
Three-body, solid, polished and brushed, screw-down case
back, hinged lugs, sapphire crystal.
White with applied yellow gold baton indexes and luminous
dots, outer minute/seconds track, subsidiary dials for the days of
the month, the week, the months, aperture for the moon phases
and the year. Luminous yellow gold baton hands.
Cal. 37582, gilt brass, oeil-de-perdrix decoration, 36 jewels,
straight-line lever escapement, monometallic balance adjusted to
5 positions, shock absorber, self-compensating flat balance spring,
21K rotor segment.