Seiko Cal. 6631 - 535

Seiko 6631-535

The 6631-535 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6631 caliber with 25j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-160874e3b9e1]

Also known as: Rally, Crown

Specifications

Movement
Kinetic
Case Material
Titanium
Case Width
42mm
Case Thickness
8.6mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
170m
Dial Color
Cream
Jewels
25j
Frequency
36,000 bph
Power Reserve
42 hours
Year
1968

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