DE BETHUNE PIECE UNIQUE MINUTE REPEATER
& PERPETUAL CALENDAR PINK GOLD
De Bethune, "Pièce Unique - Minute-Repeating Perpetual
Calendar Revolving Moon Phase". Made in 2004. Accompanied by
a certificate of authenticity.
Extremely fine and unique, large, minute-repeating with
ting-tang quarters, 18K pink gold wristwatch with platinum
and titanium balance, perpetual calendar with 3-dimensional
spherical revolving moon phase accurate to a degree of one lunar
day every 122 years, leap year indication and 18K pink gold De
Three-body, solid, polished and brushed, curved bezel,
conical lugs, flat band with correctors, snap-on transparent case
back, sapphire crystals.
Satiné silver with painted radial Roman numerals, subsidiary
date ring, apertures for the days of the week and the months,
3-dimensional blued steel and platinum rolling moon phase and
leap year indication window. Blued steel Breguet hands.
Rhodium-plated, cotes de Genève decoration, 31 jewels,
wolf's tooth winding, straight line lever escapement, patented
special 3-spoke titanium balance with platinum ogival weights,
adjusted to 5 positions, shock absorber, self-compensating free
sprung flat balance spring, swan-neck micrometer regulator, repeating
on gongs with two hammers, the quarters being struck
with alternate blows of the hammers in "ting-tang" fashion
activated by a slide on the band.