Heater Knobs on 411 Series 3

[richardgray]

Hi.

Does anyone know what the original knobs looked like on the Series 3?

Bristol Cars parts suggest a hexagonal shape. I had a single dial. The smaller of the two (1 3/8 inches) is the one on my car and the larger was sent from Bristol but is too big. They are now suggesting the hexagonal style.
Both shown below.
It needs to fit over a hexagonal 5-sided pin.
One of mine broke and am looking to replace so just looking to confirm what the correct style//part is.

Many thanks for any guidance...

Richard