Seiko Cal. 5666 - 161

The Seiko 5666-161 represents an important milestone in Seiko's 1977 lineup. With its 19mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-fb094d8ddff8]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Burgundy

Jewels

22j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1977

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