Seiko Cal. 4537 - 223

The Seiko 4537-223 represents an important milestone in Seiko's 1977 lineup. Powered by the 4537 caliber with 18j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-6428afe6288b]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

60m

Dial Color

Burgundy

Jewels

18j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1977

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