Seiko Cal. 4537 - 266

The Seiko 4537-266 represents an important milestone in Seiko's 1969 lineup. Powered by the 4537 caliber with 31j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-9c37f8038a01]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Titanium

Case Width

42mm

Case Thickness

9.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1969

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