Seiko Cal. 6663 - 521

The 6663-521 is a sought-after Kinetic piece from Seiko's golden era. With its 18mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-9b71cd24578a]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1979

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