Seiko Cal. 5637 - 335

The Seiko 5637-335 represents an important milestone in Seiko's 1967 lineup. Powered by the 5637 caliber with 31j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-23a9062a0caa]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Burgundy

Jewels

31j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1967

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