Seiko Cal. 6668 - 540

Released in 1991, the Cal. 6668 with design code 540 was part of Seiko's domestic market collection. It features a Green dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-c4a83ae96f4f]

Also known as: Navigator

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

15.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1991

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