Seiko Cal. 6131 - 635

The 6131-635 is a sought-after Hand-Winding piece from Seiko's golden era. With its 19mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-d88997f9b35b]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Champagne

Jewels

33j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1985

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