Seiko Cal. 7161 - 687

Seiko 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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