If it says "RIO CAR", then it is a Mark 2A player.

The most important piece of information we need is the player's serial number so we can look to see if it's a stolen player. If the player powers up correctly, you can find the serial number in one of the player's menus.

(There's nothing to prevent a thief from posting a fake serial number, but in that instance, since the number is hard-burned into the unit's electronics, the final buyer would discover after-the-fact whether the number was fake or not.)