Some hints on the heli. It was built in 1948/1949. According Aerofiles
Igor Sikorsky made at least one flight in it. For travel he could stay on the East Coast and the manufacturer name is still around in aviation and is well-known for major turning parts for aircraft (though I am pretty sure it is not the same company that built this heli.)
Final clue. It was called Model 1 by the manufacturer, so that must be a big help.