Seiko Cal. 6634 - 645

The 6634-645 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6634 caliber with 24j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-8a113aa6e622]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

46mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

24j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1998

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