WOW !, That's "AWESOME". You can always tell the later '46-'49 Heavy Duty COE's from the earlier ones, by the hood. The later '46-'49, have a split two piece grille, with a "alligater" hood, while the earlier one's have a one piece grille, with two access doors, instead of a opening hinged hood. That 720 series would be around a 6, or 6 1/4 ton.