Seiko Cal. 6644 - 465

The Seiko 6644-465 represents an important milestone in Seiko's 1975 lineup. Powered by the 6644 caliber with 21j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-5298395f0520]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

38mm

Case Thickness

9.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1975

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