Luggage bag (Melrose near Wyoming Cemetery.)

Would you call this a train case? A carry-on? Regardless it's from a luggage set we've had for a while, but we almost never use this piece. It has a combo lock on it that we don't know th combination. Also has a padlock with with 2 keys that does work. It has handles and a shoulder strap and a panel on the back where you can slip it onto the handle of your rolling suitcase.