Seiko Cal. 6646 - 778

This Quartz model from 1990 features a 39mm Two-Tone case. It features a Black dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-573d0270b2f3]

Also known as: Crown

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Black

Jewels

29j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1990

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