Seiko Cal. 5663 - 781

The Seiko 5663-781 represents an important milestone in Seiko's 1966 lineup. Powered by the 5663 caliber with 34j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-0730b23ee656]

Also known as: Bellmatic

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

15.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1966

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