Seiko Cal. 5691 - 310

The Seiko 5691-310 represents an important milestone in Seiko's 1974 lineup. It features a Green dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-392e0b6efeca]

Also known as: Navigator

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1974

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