Seiko Cal. 7131 - 691

The 7131-691 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-d47ea2dd151b]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

14.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Burgundy

Jewels

21j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1977

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