Seiko Cal. 6648 - 538

Released in 1975, the Cal. 6648 with design code 538 was part of Seiko's domestic market collection. With its 20mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-ee32cc01f02e]

Also known as: Turtle, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

29j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1975

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