Seiko Cal. 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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