Seiko Cal. 7131 - 856

The 7131-856 is a sought-after Spring Drive piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-a0ff3b14986c]

Also known as: Helmet, Arnie

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1970

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