What I mean by "old numbers" is the placement of the numbers for the engine under the headlights as they were in the begining when the de/dms were first brought out to the LIRR. Presently, only the 500,517 and 503 still have this type of number board. Starting in 2003, the numbers were moved to the left and right of the headlights with the new emblem of the flag and " We serve with Pride" placed on the front ( which we do!) The 520 was the first to receive that scheme. Incidently , the 516 and 512 are on the Montauk branch currently.