Seiko Cal. 6661 - 381

The Seiko 6661-381 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 8.1mm profile, it sits comfortably on most wrists. [seikata-wm-1e1dd17d8119]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1971

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