Seiko Cal. 4550 - 951

The 4550-951 is a sought-after Spring Drive piece from Seiko's golden era. With its 21mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-6fc7c54dd6df]

Also known as: Shogun, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1985

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