Seiko Cal. 3850 - 721

The Seiko 3850-721 represents an important milestone in Seiko's 1969 lineup. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-a92d9a761eb8]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

18j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1969

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