Seiko Cal. 4540 - 484

Seiko 4540-484

The Seiko 4540-484 represents an important milestone in Seiko's 1979 lineup. Powered by the 4540 caliber with 31j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-cdeeba3646c0]

Also known as: Sumo, Golden Tuna

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
9.8mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
160m
Dial Color
White
Jewels
31j
Frequency
36,000 bph
Power Reserve
72 hours
Year
1979

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