Seiko Cal. 6635 - 517

The 6635-517 is a sought-after Spring Drive piece from Seiko's golden era. It features a Green dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-ed177477ed02]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

14.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1992

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