Seiko Cal. 4478 - 644

Released in 1986, the Cal. 4478 with design code 644 was part of Seiko's domestic market collection. Powered by the 4478 caliber with 34j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-920a274594b0]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

34j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1986

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