Seiko Cal. 6633 - 673

The Seiko 6633-673 represents an important milestone in Seiko's 1976 lineup. Powered by the 6633 caliber with 28j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-ab07a85a11d1]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1976

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