Seiko Cal. 6638 - 603

Seiko 6638-603

The Seiko 6638-603 represents an important milestone in Seiko's 1978 lineup. Powered by the 6638 caliber with 32j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-ef0ce25366b6]

Also known as: Turtle, World Timer

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
38mm
Case Thickness
9.0mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
160m
Dial Color
Cream
Jewels
32j
Frequency
21,600 bph
Power Reserve
44 hours
Year
1978

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