Seiko Cal. 6688 - 490

The Seiko 6688-490 represents an important milestone in Seiko's 1978 lineup. It features a Silver dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-9ca87b701a07]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1978

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