Seiko Cal. 6639 - 327

Seiko 6639-327

The Seiko 6639-327 represents an important milestone in Seiko's 1986 lineup. Powered by the 6639 caliber with 29j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-9bbfa8914f07]

Also known as: Sumo

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
15.2mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
160m
Dial Color
Blue Sunburst
Jewels
29j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1986

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