Seiko Cal. 3817 - 203

The Seiko 3817-203 represents an important milestone in Seiko's 1979 lineup. Powered by the 3817 caliber with 28j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-f9bb1cd69960]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

28j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1979

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