Seiko Cal. 4551 - 603

Seiko 4551-603

The Seiko 4551-603 represents an important milestone in Seiko's 1990 lineup. Powered by the 4551 caliber with 28j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-9e05350fe4b5]

Also known as: Sumo, UFO

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
42mm
Case Thickness
12.4mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
100m
Dial Color
Black
Jewels
28j
Frequency
36,000 bph
Power Reserve
40 hours
Year
1990

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