Seiko Cal. 7161 - 687

The Seiko 7161-687 represents an important milestone in Seiko's 1971 lineup. Powered by the 7161 caliber with 30j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-ce5a76ba0e47]

Also known as: Monster, Rally

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1971

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