English; Technical Specifications, Descriptions, Caption - Pierre DeRoche PDR 4018 Royal Retro Mode D'emploi

English

Movement technical specifications
• Movement: Dubois Dépraz, calibre 15115
• Diameter: 36.60 mm
• Thickness: 6.85 mm
• Frequency: 4 Hz (28,800 vibrations/hour)
• Jewelling: 48 jewels
• Power reserve: 42 hours
• Oscillating weight: brass base mounted on ball-bearing
mechanism. Heavy metal peripheral segment
Movement functions
Calibre PDR 4018 drives the following displays:
• Hours
• Minutes
• Seconds (by means of 4 retrograde hands covering 10 seconds
each). In the zone running from 20 to 40, the display is
interrupted but the cycle continues; these are 20 mysterious
seconds. In actual fact, 4 hands are enough to display the
complete 60-second cycle
• Date
• Second time-zone display (GMT) adjustable in successive
half-hour jumps
Moreover, this movement is also equipped with a "raised winding-
stem" mechanism serving to ensure optimal positioning of the
winding crown on the case, which thereby facilitates handling and
enhances wearer comfort.
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