Seiko Cal. 5661 - 181

The Seiko 5661-181 represents an important milestone in Seiko's 1991 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-0542ccdaead1]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1991

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