Seiko Cal. 6131 - 940

The Seiko 6131-940 represents an important milestone in Seiko's 1965 lineup. It features a Green dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-e4ab4286eb35]

Also known as: Monster, Silverwave

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

14.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1965

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