Seiko Cal. 6645 - 706

The 6645-706 is a sought-after Spring Drive piece from Seiko's golden era. It features a Champagne dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-062c96a3bdd6]

Also known as: Sumo, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

120m

Dial Color

Champagne

Jewels

28j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1975

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