Seiko Cal. 0721 - 338

The Seiko 0721-338 represents an important milestone in Seiko's 1971 lineup. With its 22mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-8df1137a1eb4]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

15.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

35j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1971

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