Seiko Cal. 6638 - 984

The 6638-984 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6638 caliber with 24j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-beb68f88cb2c]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

15.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

24j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1994

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