Seiko Cal. 6658 - 739

Released in 1972, the Cal. 6658 with design code 739 was part of Seiko's domestic market collection. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-6fc5ca561e38]

Also known as: Bellmatic

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

43mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1972

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