Seiko Cal. 5644 - 747

Seiko 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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