Seiko Cal. 6635 - 868

Seiko 6635-868

The 6635-868 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6635 caliber with 30j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-6edd503f3d2c]

Also known as: Silverwave, Bellmatic

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
41mm
Case Thickness
10.5mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
180m
Dial Color
Navy
Jewels
30j
Frequency
28,800 bph
Power Reserve
55 hours
Year
1977

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