Seiko Cal. 6644 - 243

The 6644-243 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6644 caliber with 27j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-c63b682a0c94]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Green

Jewels

27j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1997

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