Seiko Cal. 5639 - 307

The Seiko 5639-307 represents an important milestone in Seiko's 1972 lineup. It features a Navy dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-0bfa8e82435d]

Also known as: UFO

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1972

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