Seiko Cal. 6690 - 401

The Seiko 6690-401 represents an important milestone in Seiko's 1978 lineup. It features a Silver dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-4da29cdd4429]

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

8.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Silver

Jewels

30j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1978

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