Seiko Cal. 6638 - 546

The 6638-546 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6638 caliber with 30j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-4495acaffe76]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

43mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Green

Jewels

30j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1990

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