Seiko Cal. 6644 - 251

The 6644-251 is a sought-after Spring Drive piece from Seiko's golden era. It features a Champagne dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-be737de36c6f]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Champagne

Jewels

32j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1994

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