Seiko Cal. 5635 - 403

The 5635-403 is a sought-after Spring Drive piece from Seiko's golden era. With its 21mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-dbcb3ddf85d1]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

White

Jewels

31j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1975

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