Seiko Cal. 4540 - 831

Seiko 4540-831

This Automatic model from 1977 features a 42mm Stainless Steel case. Powered by the 4540 caliber with 33j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-1ef2f549ea57]

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
12.8mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
90m
Dial Color
Black
Jewels
33j
Frequency
28,800 bph
Power Reserve
54 hours
Year
1977

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