Seiko Cal. 6131 - 437

Released in 1975, the Cal. 6131 with design code 437 was part of Seiko's domestic market collection. It features a Green dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-7c4fea6f0f00]

Also known as: Monster, Goldfeather

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1975

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