Seiko Cal. 0720 - 503

The Seiko 0720-503 represents an important milestone in Seiko's 1970 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-096f80fac860]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

14.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1970

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