Seiko Cal. 4437 - 863

Seiko 4437-863

The 4437-863 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4437 caliber with 26j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-5ca8827de401]

Also known as: Sumo, Baby Tuna

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
43mm
Case Thickness
9.4mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Navy
Jewels
26j
Frequency
36,000 bph
Power Reserve
52 hours
Year
1976

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seikata-wm-5ca8827de401