Seiko Cal. 3817 - 578

Released in 1987, the Cal. 3817 with design code 578 was part of Seiko's domestic market collection. With its 18mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-4bf75bebdc1f]

Also known as: Sumo, Arnie

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Silver

Jewels

18j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1987

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