Seiko Cal. 3817 - 721

Released in 1969, the Cal. 3817 with design code 721 was part of Seiko's domestic market collection. With its 19mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-d92bd90335ab]

Also known as: Samurai, Flighty

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1969

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