Seiko Cal. 3817 - 204

The 3817-204 is a sought-after Solar piece from Seiko's golden era. Powered by the 3817 caliber with 36j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-99a8204e5bf0]

Also known as: UFO, Sportsmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

46mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

80m

Dial Color

Green

Jewels

36j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1982

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