Seiko Cal. 5648 - 680

The Seiko 5648-680 represents an important milestone in Seiko's 1971 lineup. With its 21mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-5664a4cff368]

Also known as: Monster, Bellmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1971

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