Seiko Premier Kinetic Perpetual Calendar SNP021P1 SNP021 SNP021P

Perpetual Calendar with leap year correct until February 28, 2100. Time relay system preserves accurate time for up to 4 years. When the watch senses 24 hours of inactivity, it puts itself into suspended animation (sleep mode) to conserve energy. The date continues to advance correctly while the watch is asleep. Wake it up with a few shakes of your wrist and it automatically resets itself to the correct time even if it has been asleep for up to 4 Years.

Features:

Movement : Kinetic (no battery required). Powered by the movement of your hand.
24 hour hand
Month hand
Calibre: 7D56
Leap year hand (7D46 / 7D56)
Leap year disc (7D56)
Power save function
Accuracy: 15 sec. / month
Water resistance: 100m
Movement from Japan
Scratch resistant Sapphire crystal
Stainless steel case
Diameter: 43mm including crown
Thickness: 12mm

Manual:
http://www.seikowatches.com/support/ib/pdf/SEIKO_7D56c.pdf