Seiko Cal. 6643 - 642

The 6643-642 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-ecfe7ec9aeb6]

Also known as: Shogun, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

8.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1998

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