Seiko Cal. 6654 - 642

The Seiko 6654-642 represents an important milestone in Seiko's 1971 lineup. With its 19mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-438d10f24fb2]

Also known as: Tuna, UFO

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

10.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Burgundy

Jewels

20j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1971

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