Seiko Cal. 5661 - 364

The Seiko 5661-364 represents an important milestone in Seiko's 1977 lineup. With its 20mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-722c62ce8563]

Also known as: Flighty

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1977

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