This 1949-1950 Chevy Heater Switch is NOS new and is used with the “Airflow Heater”. In the early 50’s GM offered several heaters to be installed in their vehicles. One was the Air Flow. There was also the Harrison and there were units that were installed by the dealer.
To be accurate with what parts you need make sure you look at any labels on your heater and reference that manufacturers name when looking for parts.
No one makes a reproduction of this switch so your only choice
If you have any questions concerning this parts or any part please call me at 352 875 2344