Original industrial trade vintage catalog for JULIAN D'ESTE COMPANY, was located at 6 Spice Street (Charlestown District), Boston, MA. Sole Manufacturers of Curtis Engineering Specialties, Temperature Regulator, Steam Trap, Bulb Thermostat, Hydraulic Damper, U.S. Tank Valve. Type D and Type K Regulators. Disbound from a large 1931 industrial catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro industrial equipment library. Slight damp stain on outer edge.