Seiko Cal. 3817 - 630

Released in 1975, the Cal. 3817 with design code 630 was part of Seiko's domestic market collection. With its 21mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-eca886cdae9c]

Also known as: Sumo, Shogun

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Green

Jewels

23j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1975

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