Seiko Cal. 5277 - 981

This Spring Drive model from 1974 features a 36mm Two-Tone case. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-7554eda4d6d5]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Burgundy

Jewels

31j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1974

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