Seiko Cal. 6663 - 540

The 6663-540 is a sought-after Spring Drive piece from Seiko's golden era. It features a Champagne dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-7455cba90ec6]

Also known as: Tuna, Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

14.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Champagne

Jewels

17j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1996

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