Seiko Cal. 4539 - 312

The Seiko 4539-312 represents an important milestone in Seiko's 1975 lineup. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-15b900ed1b99]

Also known as: UFO, Sportsmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

30j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1975

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