Seiko Cal. 0723 - 840

The Seiko 0723-840 represents an important milestone in Seiko's 1972 lineup. With its 19mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-5378d393a975]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

36j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1972

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