Seiko Cal. 6641 - 523

The 6641-523 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-b910b129120d]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

15.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1998

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