Ben, your P would not have had fhe Cooper Stewart speedo with the Allard logo it would havs been the Smiths unit. Both are difficult to find and expensive if you do, about ££200  - £300 for a good one. Alvis TC-TF series used the same unit with a different bezel which youmight be able to change. I may have one if you get stuck. I featured an excellent instrument restorer in the Autumn Tailwagger who I can recommend.    
21 February 2021 at 2:57 PM #5784
BartRatkiewicz
Participant

Ben, your P would not have had fhe Cooper Stewart speedo with the Allard logo it would havs been the Smiths unit.

Both are difficult to find and expensive if you do, about ££200  – £300 for a good one.

Alvis TC-TF series used the same unit with a different bezel which youmight be able to change. I may have one if you get stuck.

I featured an excellent instrument restorer in the Autumn Tailwagger who I can recommend.