Seiko Cal. 6635 - 543

Seiko 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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