Seiko Cal. 0720 - 645

The Seiko 0720-645 represents an important milestone in Seiko's 1979 lineup. It features a Green dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-53525d1e207e]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Green

Jewels

30j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1979

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