Seiko Cal. 6641 - 487

The Seiko 6641-487 represents an important milestone in Seiko's 1977 lineup. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-585ef76ae89e]

Also known as: UFO

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1977

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