Seiko Cal. 5640 - 796

The 5640-796 is a sought-after Solar piece from Seiko's golden era. Powered by the 5640 caliber with 18j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-99a171fa8e6b]

Also known as: Monster

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Cream

Jewels

18j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1978

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