Seiko Cal. 6635 - 717

The 6635-717 is a sought-after Spring Drive piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-2eddf8e78ffb]

Also known as: Silverwave, Navigator

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1970

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