Seiko Cal. 6648 - 623

The Seiko 6648-623 represents an important milestone in Seiko's 1998 lineup. Powered by the 6648 caliber with 28j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-d0f95dddf218]

Also known as: Monster, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1998

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