Seiko Cal. 7143 - 380

The Seiko 7143-380 represents an important milestone in Seiko's 1971 lineup. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-ead2fd30138f]

Also known as: Tuna, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1971

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