Seiko Cal. 6640 - 802

The 6640-802 is a sought-after Spring Drive piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-ffe13e97e6f8]

Also known as: Silverwave, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

12.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

28j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1978

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