Seiko Cal. 5637 - 566

The 5637-566 is a sought-after Solar piece from Seiko's golden era. Powered by the 5637 caliber with 21j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-0198ac7f183b]

Also known as: Tuna, Arnie

Specifications

Movement

Solar

Case Material

Titanium

Case Width

46mm

Case Thickness

14.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

160m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1985

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