I'm not seeing the remains of a label on the bottom of the box, just the standard paper sheet covering the turned over ends of the decorative box side sheets.
It would in any case be unusual for a B-L label to be on the bottom of the box but normally would be on one end with the ship's name together with a standard company B-L label on the left hand end of the top.
Did you not venture to see if there is a label on the bottom of the ship?