Seiko Cal. 6639 - 544

The Seiko 6639-544 represents an important milestone in Seiko's 1972 lineup. It features a Green dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-54b76801c6f7]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1972

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