Seiko Cal. 6633 - 428

The Seiko 6633-428 represents an important milestone in Seiko's 1981 lineup. With its 22mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-ab8ddf5bf88b]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1981

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