Original lab equipment trade vintage catalog for CALCULAGRAPH COMPANY. Main office and factory was located at 50 Church Street, New York City, NY. Manufacturer of Elapsed Time Recorders. For factories, machine shops, telephone exchanges, where accurate records are needed. Time clock, daily record cards. Disbound from a large 1936 industrial lab catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro industrial equipment library.