Seiko Cal. 6656 - 724

The Seiko 6656-724 represents an important milestone in Seiko's 1968 lineup. Powered by the 6656 caliber with 31j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-9be3abd7607f]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

White

Jewels

31j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1968

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