Seiko Cal. 6644 - 930

The Seiko 6644-930 represents an important milestone in Seiko's 1987 lineup. Powered by the 6644 caliber with 33j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-13766120ce85]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1987

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