Seiko Cal. 5635 - 617

The 5635-617 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-cc7fd16626ff]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1968

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