Seiko Cal. 5640 - 552

This Solar model from 1977 features a 42mm Titanium case. Powered by the 5640 caliber with 24j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-51854fa26f51]

Also known as: Sumo, Panda

Specifications

Movement

Solar

Case Material

Titanium

Case Width

42mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1977

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