Seiko Cal. 5665 - 121

The Seiko 5665-121 represents an important milestone in Seiko's 1978 lineup. With its 22mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-5ed6fc1ba6bb]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Champagne

Jewels

30j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1978

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