Seiko Cal. 6638 - 352

Seiko 6638-352

This Spring Drive model from 1967 features a 38mm Gold-Plated case. Powered by the 6638 caliber with 34j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-af99ecf53af3]

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
38mm
Case Thickness
8.3mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
90m
Dial Color
Cream
Jewels
34j
Frequency
28,800 bph
Power Reserve
65 hours
Year
1967

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