Seiko Cal. 6639 - 650

Released in 1990, the Cal. 6639 with design code 650 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-6efdbcec1fb9]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1990

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