Seiko Cal. 6630 - 541

The Seiko 6630-541 represents an important milestone in Seiko's 1969 lineup. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-a7a4efbda550]

Also known as: Tuna, UFO

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1969

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