Seiko Cal. 7131 - 381

The 7131-381 is a sought-after Quartz piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-c5af0d579f3d]

Also known as: Sumo, Helmet

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1974

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