Seiko Cal. 6641 - 527

The Seiko 6641-527 represents an important milestone in Seiko's 1971 lineup. It features a Green dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-35940e0b1d38]

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

45mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1971

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