Seiko Cal. 5644 - 747

The 5644-747 is a sought-after Solar piece from Seiko's golden era. Powered by the 5644 caliber with 19j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-92b3073edbc2]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

39mm

Case Thickness

12.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1980

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