Seiko Cal. 6397 - 990

Seiko 6397-990

The 6397-990 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6397 caliber with 31j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-c993f0d0d56b]

Also known as: Sumo, Silverwave

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
15.5mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
40m
Dial Color
Burgundy
Jewels
31j
Frequency
28,800 bph
Power Reserve
46 hours
Year
1983

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