Seiko Cal. 7181 - 351

The 7181-351 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-11162f06bd2d]

Also known as: Helmet, Emperor

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Navy

Jewels

33j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1980

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