Thank you very much viewfield, very good prompt responce and good clear images.
Your probably not that interested, but both examples of the Y-10 you have in your Auction win, that you have very kindly re-photographed for me, have the 'narrow' brake lever mounting point, the actual area that the levers casting is pressed into, on that part of the body. If you look at 'my' image again, you can see that this is a 'wider' design and comes from 1972, the 'narrow' design was used on the model from 1969, (the year this Rolls-Royce was introduced) until the end of 1971.
If yours were of the 'wide' design, I would have been making an offer for them...

but they are not, so keep them for your own collection, cheers for reading all this, it was quite interesting after all...
GHOSTHUNTER.