Well.....interesting enough.....I have seen a few dozen games in my travels and have seen the following:
Black bezels....3 red coin return buttons.
Color coded bezels.....3 red coin return buttons (this is what my game has).
Black bezels.....color coded coin return buttons.
Once you see the multi-colored buttons lit up.....it just looks kewl.....and then you will want a set. Saw a set for sale but they came 'coin door attched' for $75. I didn't want them that bad.
Keep looking....you will run across them. Ironically....I just stayed in a hotel last month that had a working SOR game! Of course....it had the multi-colored buttons!
Alan
P.s. You can also look on the original flyer (showing the early style machine).....and see the right hand button is blue!