Sargent & Greenleaf, Rochester, New York - 3 movements

  A

A. A modern version of the 6300 series. In the later half of the 20th century many manufacturers cut costs by dispensing with the metal door and replacing it with a screwed on plastic (or in this case combination metal / plastic) cover; often with integral lenses for easier reading of the dial. c. 1984. Below is a Diebold vault door with a #6300 timer. file 61