Seiko Cal. 0720 - 850

The Seiko 0720-850 represents an important milestone in Seiko's 1981 lineup. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-8390e2bb7ae3]

Also known as: Crown, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Green

Jewels

27j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1981

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