Original laboratory trade vintage catalog for CONSOLIDATED ASHCROFT HANCOCK COMPANY, INC. was located in Bridgeport, CT. Manufacturers of American Quality Gauges, Gage. Recording, Duragauges, Testers, Mercury Column Vacuum, Absolute Pressure, Recording Thermometers, Dial, Precision Temperature Controllers, Indicating Tachometers. Unbound from a large 1931 engineering catalog, this unique old one page technical brochure would exhibit beautifully matted and framed. A fantastic addition to your retro industrial instrument collection. Slight damp stain on outer edge.