Seiko Cal. 6630 - 657

The Seiko 6630-657 represents an important milestone in Seiko's 1966 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-399ea2ac4b7d]

Specifications

Movement

Solar

Case Material

Titanium

Case Width

34mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1966

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