Seiko Cal. 6635 - 143

The Seiko 6635-143 represents an important milestone in Seiko's 1990 lineup. It features a Green dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-a85e211a4bf7]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

34mm

Case Thickness

10.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1990

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