Seiko Cal. 4539 - 931

The Seiko 4539-931 represents an important milestone in Seiko's 1969 lineup. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-bd96181dad9a]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1969

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