Seiko Cal. 6640 - 294

The 6640-294 is a sought-after Quartz piece from Seiko's golden era. It features a Burgundy dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-99a78f1a35d4]

Also known as: Sumo, Bullhead

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Burgundy

Jewels

36j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1973

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