Help with info on SD Prints please

Hi... I have collected a few SD tiles over the years but have to admint I have never come across SD prints. I have uploaded photos of 2 framed prints I have seen. Can anyone tell me anything about them? Was this SD's art before tiles? Or are these just images of certain tiles? Any idea if they have any value or what they would be worth? I know they are only prints, not originals but would like to know something more about them than that!

Thanks