Seiko Cal. 6639 - 277

The Seiko 6639-277 represents an important milestone in Seiko's 1975 lineup. Powered by the 6639 caliber with 20j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-519276479eb5]

Also known as: Crown

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1975

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