Thank you so much to Ben Cox for this letter with the follow picture of OPA2.

They are a very important point of the great history about this Healey Silverstone

ready to start - OPA2, driver: Jean Mortimer, assistant: her husband Charles Mortimer

Charles and Jean Mortimer

behind: E.Lloyd-Jones, Triangle "Flying Sauler" 21.000c.c. Kestrel Aero Engine