Seiko Cal. 0728 - 239

This Spring Drive model from 1975 features a 39mm Hardlex-Coated Steel case. With its 20mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-e1cc4fb60883]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1975

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