Seiko Cal. 5661 - 991

Seiko 5661-991

The 5661-991 is a sought-after Solar piece from Seiko's golden era. Powered by the 5661 caliber with 25j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-97ae1475c848]

Also known as: Shogun, Sportsmatic

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
45mm
Case Thickness
10.7mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Blue Sunburst
Jewels
25j
Frequency
36,000 bph
Power Reserve
61 hours
Year
1978

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seikata-wm-97ae1475c848