Seiko Cal. 5645 - 820

The 5645-820 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5645 caliber with 20j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-361a08b89b37]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

41mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1983

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