Seiko Premier Kinetic Perpetual Calendar SNP023P1 SNP023 SNP023P

Seiko Premier Kinetic Perpetual Calendar SNP023P1 SNP023 SNP023P

Features:
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. 
Movement : Kinetic (no battery required). Powered by the movement of your hand.
24 hour hand
Month hand
Calibre: 7D48
Leap year hand (7D46 / 7D56)
Leap year disc (7D48)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

Caliber Operation:
http://caliber.seikowatches.com/