Seiko Cal. 3856 - 645

The 3856-645 is a sought-after Solar piece from Seiko's golden era. Powered by the 3856 caliber with 27j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-d8a0bdd6a1e4]

Also known as: Tuna, World Timer

Specifications

Movement

Solar

Case Material

Titanium

Case Width

43mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1973

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