Seiko Cal. 4539 - 757

The Seiko 4539-757 represents an important milestone in Seiko's 1979 lineup. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-acd527bf130e]

Also known as: Turtle, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Champagne

Jewels

27j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1979

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