Seiko Cal. 4561 - 837

The Seiko 4561-837 represents an important milestone in Seiko's 1966 lineup. Powered by the 4561 caliber with 18j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-6d5a19e8fd84]

Also known as: Sumo, Sea Horse

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

White

Jewels

18j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1966

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