Seiko Cal. 6648 - 991

The Seiko 6648-991 represents an important milestone in Seiko's 1977 lineup. Powered by the 6648 caliber with 25j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-46e508732b6a]

Also known as: Turtle, Crown

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1977

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