Seiko Cal. 5691 - 163

Seiko 5691-163

The Seiko 5691-163 represents an important milestone in Seiko's 1971 lineup. Powered by the 5691 caliber with 30j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-e7c5d56987e3]

Also known as: Monster, Helmet

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
38mm
Case Thickness
13.5mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
150m
Dial Color
White
Jewels
30j
Frequency
36,000 bph
Power Reserve
61 hours
Year
1971

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