MT TDG502 Dryer
WOW the outside is in good shape, someone really babied that dryer, congratulations on a rare find., The T in the model # is for turquoise, the exact matching washer would be a TA502 or a TA502S if it has the California Water Resources Board Required Suds-Saver, LOL. Your best chance at getting a matching washer may be to get a white one and have it painted.
If you want to put this dryer into regular use it should be gone over fairly completely mechanically, and cleaned and lubricated. The parts that usually would need replacement are belts, motor pulley and the front felt seals that are around the inlet shroud and other parts as needed. I did a gas HOH dryer a year ago and just completed a DE750 electric model, I do have some extra parts around if you need them, Good Luck , John.