Seiko Cal. 7171 - 985

The Seiko 7171-985 represents an important milestone in Seiko's 1975 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-b4252d584758]

Also known as: Helmet, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

White

Jewels

33j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1975

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