Seiko Cal. 6634 - 963

Seiko 6634-963

The Seiko 6634-963 represents an important milestone in Seiko's 1971 lineup. Powered by the 6634 caliber with 25j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-3c2c853112b2]

Also known as: Tuna, Navigator

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
13.4mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
60m
Dial Color
Blue Sunburst
Jewels
25j
Frequency
36,000 bph
Power Reserve
43 hours
Year
1971

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seikata-wm-3c2c853112b2