Original heating trade vintage catalog for MINNEAPOLIS-HONEYWELL REGULATOR COMPANY. Main office and factory was located at 2992 Forth Avenue South, Minneapolis, MN. Manufacturers of Thermostats, Limit Controls and Primary Controls. Honeywell Chronotherm, fully automatic electric clock thermostat. Honerywell Diffusion Register. Disbound from a large 1948 home builders automatic heating catalog, this unique old eight page technical brochure would display wonderfully matted and framed. Nice cover graphics. A marvelous addition to your retro heating equipment library. Pages are detached and may contain a small amount of residual glue on edge.