Roy Cross prints are on Ebay, just search his name
Not Roy Cross, but Carless, Just bought 3 off Ebay, 2 at £20 and one at £25, I could not believe what I was staring at..
They are the original watercolours used by FROG on their model boxes........ they are Stunning and were just advertised as Original Watercolours, so I took a punt, they have Christies auction stickers on the back from 1995, so I am going to find out more about them from Christies...... I think they are a serious bargain and I was the only (lucky) bidder... I had my fingers and legs crossed
These are what I got, the Lower one has some slight fading, but I would have paid a lot more for them, just need remounting and framing.
And an example of it on the boxlid