Seiko Cal. 7131 - 191

The Seiko 7131-191 represents an important milestone in Seiko's 1973 lineup. It features a Navy dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-0e386ee07a8e]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Titanium

Case Width

45mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1973

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