Seiko Cal. 6635 - 543

The Seiko 6635-543 represents an important milestone in Seiko's 1967 lineup. Powered by the 6635 caliber with 34j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-f73564872b32]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1967

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