Seiko Cal. 0731 - 244

The Seiko 0731-244 represents an important milestone in Seiko's 1966 lineup. Powered by the 0731 caliber with 21j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-cc7145cdeca2]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1966

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