Antique Pneumatic Temperature Regulation Panel by Johnson vintage simulators light discoloration and wear present

light discoloration and wear present on the seat and backrest from use

especially as refrigeration made it to more rural areas

in doing so

Rows of hand-set steel pins deflect the balls as they descend

The embellishments on the top and bottom are also of painted metal construction and boast a bright

Antique Pneumatic Temperature Regulation Panel by Johnson vintage simulators light discoloration and wear presentc. 1910s 1930s; Johnson Service Company New York A handsome early pneumatic control panel from the Johnson System of automatic temperature regulation one of the foundational technologies that shaped modern HVAC control. Housed in a solid wood case with dovetailed construction, the panel incorporates a large Johnson Service Company air pressure gauge, two manual dial controls labeled Open and Closed, and a metal maker's plate detailing the system's