Seiko Cal. 6131 - 978

The 6131-978 is a sought-after Hand-Winding piece from Seiko's golden era. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-81897c9ed0fa]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

22j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1991

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