Seiko Cal. 4485 - 638

Seiko 4485-638

The Seiko 4485-638 represents an important milestone in Seiko's 1980 lineup. Powered by the 4485 caliber with 20j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-c8e2ba8adfbe]

Also known as: Sumo, Golden Tuna

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
39mm
Case Thickness
9.1mm
Lug Width
21mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
100m
Dial Color
Burgundy
Jewels
20j
Frequency
21,600 bph
Power Reserve
60 hours
Year
1980

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