Seiko Cal. 6634 - 553

The 6634-553 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-ed909df4bd9b]

Also known as: World Timer, Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Navy

Jewels

18j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1978

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