Seiko Cal. 5681 - 563

The Seiko 5681-563 represents an important milestone in Seiko's 1966 lineup. Powered by the 5681 caliber with 20j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-85e2aaf0fb36]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1966

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