Seiko Cal. 5640 - 503

The Seiko 5640-503 represents an important milestone in Seiko's 1982 lineup. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-86f0fb7ce56f]

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

44mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1982

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