Seiko Cal. 6648 - 727

The Seiko 6648-727 represents an important milestone in Seiko's 1990 lineup. Powered by the 6648 caliber with 23j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-c56cf6363eda]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Black

Jewels

23j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1990

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