Seiko Cal. 6661 - 649

The Seiko 6661-649 represents an important milestone in Seiko's 1967 lineup. Powered by the 6661 caliber with 24j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-31a29f080495]

Also known as: Tuna, UFO

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Cream

Jewels

24j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1967

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