Seiko Cal. 7031 - 639

The Seiko 7031-639 represents an important milestone in Seiko's 1975 lineup. It features a Navy dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-072e93de037e]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1975

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