Join Date: Aug 2007
Location: Staunton, VA - USA
An additional update.
I have been told that, depending on the era and the car, Crewe used power antenna assemblies made by Ford and by GM. On another forum I participate in someone said they recall having replaced the antenna on a Silver Shadow "One Series" with a Ford power antenna and it was the same down to the bezel.
My Silver Shadow II had a new aftermarket power antenna assembly put in a few years ago and it works just fine. It has the added advantage of being operated by whether or not the radio is powered on or not rather than through the Aerial switch.
Your best bet might be to go to your local automobile stereo installer and see if you can make a match to their power antenna stock.
The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth. ~ Niels Bohr