Seiko Cal. 6639 - 780

Released in 1985, the Cal. 6639 with design code 780 was part of Seiko's domestic market collection. It features a Burgundy dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-ffedc6cca8db]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

31j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1985

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