Thanks Dorian, good tip and I intend to bid. On ebay one can never count on getting something at a good value price, unless of course it is listed as "buy it now"!
Agree with you, these two bikes do appear to be production versions. But I would like to obtain more photos with more details! Assuming it's a production machine, you can't get much better proof of correctness than pointing at a picture known to have been snapped in 1953 and saying "check this little detail out". The camera really is the nearest thing to a time machine.
Originally Posted by Dorian
There is a copy of this book on ebay at the moment, good value too.
I have seen quite a lot of pictures of these two show bikes but can't find my copies at the moment. They are basicaly production versions with virtualy no difference to the production bikes.