Totally off topic, but you would not believe what I saw the other day when visiting what is now Barcrest in Manchester. They still have portfolios full of the original pencil sketches of games we know and love from back in the day. Saw the concept art for Psycho Cash Beast, Frenzy, Battle Axe and 100s more besides. Absolute works of art.
There were loads more from game that never made it to production. Honestly, I was like a kid in a sweet shop. Amazing stuff.
I'll ask nicely and see if I can get a pic of one, can't see why they'd object too much.
I wish someone would do an exhibition of fruit machine art. Everyone will have seen it, but probably never thought there's some very skilled people behind it all.