Seiko Cal. 5661 - 180

This Spring Drive model from 1975 features a 39mm Two-Tone case. With its 20mm lug width and 8.1mm profile, it sits comfortably on most wrists. [seikata-wm-ef1aa7125933]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1975

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