The very first Caldor unit, a 1,500 square foot appliance store, opened for business in November 1951. This mercantile, which had also been installed in a former Mill building, was similar to original stores in the Ames, Ann & Hope and Mammoth Mart chains. Our oldest Caldor logo (seen above) dates to 1957. 
Graphic from Caldor, Incorporated 


This Caldor logo was in use around 1960.
Graphic from Caldor, Incorporated


A Caldor logo of the mid-1960s. 
Graphic from Caldor, Incorporated 


The typical Caldor store, circa-1964.
Drawing from Caldor, Incorporated 


By 1969, new Caldor stores looked like this.
Drawing from Caldor, Incorporated