Seiko Cal. 4539 - 644

Seiko 4539-644

The 4539-644 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4539 caliber with 33j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-08f0c7b662b7]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
34mm
Case Thickness
14.6mm
Lug Width
21mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
Burgundy
Jewels
33j
Frequency
21,600 bph
Power Reserve
67 hours
Year
1978

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