Seiko Cal. 5663 - 303

Released in 1981, the Cal. 5663 with design code 303 was part of Seiko's domestic market collection. With its 18mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-f2a5ad1bfe3c]

Also known as: Bullhead, Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1981

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