Maytag Info
Swestoyz is right- September 1973. You have a series "0" machine. You should have the front panel chrome strip, blue and grey plastic timer dial, probably a 4499-1 Mallory "scritching" timer, edge shaded front panel, and permanent press cycle on the dial.
If I were you I'd try to save the lid if it's not too far gone, if you want the color to match right. Many times when you switch lids the color will be a little different and look weird. You can pull off the lid, sand down the rust spots with emery paper or a small emery wheel on a Dremel tool, mask off the good areas of porcelain, put on a thin coat of JB Weld and rub it thin and smooth with a wet finger, let dry for at least 24 hours, color match the paint and have it put in a spray can, spray a couple of light coats to seal, and put it in a small hot room or chamber to cure. Be careful with the heated area. Don't burn your house down.
If the ball hinge indentions are rusted, you'll have to be careful not to use too much JB Weld or paint in them or the balls may not snap the lid back on because of too much build up.
That's what I'd try to do. Especially if the top of the lid looks ok. If you can find a donor lid that suits you, go for it. Other wise I'd try and restore it. FYI- Leaving the lid open after the laundry is done will help stop the rusting problem.
Looks like you've got a big job ahead of you. Good luck.