Heater Control Valves

Posted by Packard Don On 2017/5/14 13:33:04

I just came across a 1948-1950 NOS heater control valve in my stock of parts and while researching it, I notice that the Packard parts book lists different valves between 1951 and 1954 when I had always thought them to be the same. I've owned many Packards covering all these years but never noticed (or paid attention) to any differences so does anyone know what they might be?