Seiko Cal. 5666 - 820

The 5666-820 is a sought-after Quartz piece from Seiko's golden era. It features a Cream dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-e592ccaa13cd]

Also known as: Silverwave, Baby Tuna

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

12.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

30j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1981

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