Seiko Cal. 5661 - 503

The Seiko 5661-503 represents an important milestone in Seiko's 1999 lineup. The Inner Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-3e086c423957]

Also known as: UFO

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

36mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

22j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1999

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