Seiko Cal. 6690 - 624

The Seiko 6690-624 represents an important milestone in Seiko's 1978 lineup. It features a Black dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-3abe4278068a]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1978

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