Seiko Cal. 6648 - 642

The 6648-642 is a sought-after Hand-Winding piece from Seiko's golden era. With its 20mm lug width and 12.9mm profile, it sits comfortably on most wrists. [seikata-wm-ed3fbd9964ff]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

24j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1978

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