Seiko Cal. 6639 - 274

Seiko 6639-274

The 6639-274 is a sought-after Solar piece from Seiko's golden era. Powered by the 6639 caliber with 22j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-aee7c998a3b3]

Also known as: Sumo

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
39mm
Case Thickness
11.7mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
160m
Dial Color
Blue Sunburst
Jewels
22j
Frequency
28,800 bph
Power Reserve
43 hours
Year
1999

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