This is perhaps the most mysterious of all the Mysterious Adventures I have seen to date. This is clearly an early copy of the game based on the tape label. However my source insists the inlay was original and not custom-made by the owner. If anyone has seen any of the series with hand-drawn inlays like this please let us know. Chances are someone just drew this themselves to identify the tape more quickly, but if the very first copies were indeed sold like this that would be very interesting indeed. Hopefully a museum visitor can shed some light on this mystery!