Seiko Cal. 5691 - 773

The Seiko 5691-773 represents an important milestone in Seiko's 1979 lineup. It features a Black dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-7fb41982c7ce]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

8.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1979

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