Ive run several 545 tractors well they are called landscape loaders or skip loaders. Then ones i used had a power down 3 point and with a power top link and side link for a Gannon box blade an usually a hydraulic scarifier. We used them finnish grades where our grader can get into and on jobs where our grader was too small to get into.
An "A" prefix Serial Number (Antwerp) is not going to be on a 545D. It would have to be a "C" (Romeo).