Seiko Cal. 6639 - 390

Released in 1972, the Cal. 6639 with design code 390 was part of Seiko's domestic market collection. With its 22mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-9bc75a2bf1fd]

Also known as: Panda, Navigator

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

9.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Champagne

Jewels

35j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1972

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