Seiko Cal. 0737 - 581

The Seiko 0737-581 represents an important milestone in Seiko's 1971 lineup. Powered by the 0737 caliber with 21j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-19063210d8c2]

Also known as: Sea Horse, Flighty

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Burgundy

Jewels

21j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1971

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