Seiko Cal. 5661 - 840

The 5661-840 is a sought-after Solar piece from Seiko's golden era. Powered by the 5661 caliber with 30j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-d0b1af2fef71]

Also known as: Sumo, Goldfeather

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

14.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1983

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