Seiko Cal. 5639 - 392

Seiko 5639-392

The 5639-392 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5639 caliber with 35j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-87de95f0c42e]

Also known as: Sportsmatic

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
8.2mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
200m
Dial Color
Burgundy
Jewels
35j
Frequency
28,800 bph
Power Reserve
70 hours
Year
1973

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