Shelf Calendar Clock

This is an example of an Ithaca Calendar Clock model called “3 ½ Parlor” from the mid 1870s. Its walnut case has ebonized decorative elements. The black upper dial shows the time in white Roman numerals, with winding arbors at IIII and VIII for the brass eight-day time-and-strike spring-driven movement behind the dial. Lower clear glass has reverse-painted white Arabic numerals for date of the month. Metal calendar apparatus visible inside case, where rotating wheels show weekday and month.
The Ithaca Calendar Clock Co., established in Ithaca, N.Y., about 1865, made clocks based on the automatic perpetual calendar mechanism patented by Henry Bishop Horton in 1865 and 1866 (see patent 57,510).
Currently not on view
Object Name
date made
ca 1875
ca 1875-1900
Ithaca Calendar Clock Company
Physical Description
wood (case material)
overall: 20 in x 10 1/4 in x 5 3/8 in; 50.8 cm x 26.035 cm x 13.6525 cm
ID Number
catalog number
accession number
Measuring & Mapping
See more items in
Work and Industry: Mechanisms
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
I.B.M. Corporation

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