Seiko Cal. 6639 - 450

The Seiko 6639-450 represents an important milestone in Seiko's 1986 lineup. It features a Navy dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-1b40841333d5]

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1986

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