Roger Dubuis RD821J, Instructions For Use Manual

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RD821J Movement
Perpetual calendar
Features
Perpetual calendar
Self-winding mechanical movement
Power-reserve of approximately 48 hours
Finely adjusted in five positions
Functions
Hours and minutes
Day of the week by aperture at 11 o’clock
Month by aperture at 1 o’clock
Date hand at 4 o’clock
Leap-year by aperture at 3 o’clock
Moon phases by aperture at 7.30
Decorations
Rhodium-plated
“Côtes de Genève” decoration
“Poinçon de Genève” finishings
Specifications
358 components
33 jewels
Diameter: 12
3/4 ’’’
Thickness: 5.28 mm
Frequency: 4 Hz (28,800 vph)
Certification
This movement is stamped
with the “Poinçon de Genève”