Seiko Cal. 6640 - 462

The 6640-462 is a sought-after Quartz piece from Seiko's golden era. It features a Green dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-a388e6f81206]

Also known as: Silverwave

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Green

Jewels

23j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1992

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