Seiko Cal. 6658 - 120

The Seiko 6658-120 represents an important milestone in Seiko's 1974 lineup. Powered by the 6658 caliber with 31j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-8bb122032ce3]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

34mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

190m

Dial Color

White

Jewels

31j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1974

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