Seiko Cal. 6638 - 575

Seiko 6638-575

The Seiko 6638-575 represents an important milestone in Seiko's 1985 lineup. Powered by the 6638 caliber with 24j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-8cac4a035c97]

Also known as: Monster, Arnie

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
35mm
Case Thickness
8.6mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
140m
Dial Color
Navy
Jewels
24j
Frequency
21,600 bph
Power Reserve
71 hours
Year
1985

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