Seiko Cal. 6636 - 391

The 6636-391 is a sought-after Solar piece from Seiko's golden era. With its 20mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-bcae586067dd]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

33j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1987

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