Seiko Cal. 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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