Found this one tucked behind the velvet in my grandfather's coin box. Looks like MD on date in the 43 but the 4 he a chunk missing top and bottom and mint mark looks doubled? Reverse in very good shape !
Never use soap and water. A soak in Pure acetone. (In a well ventilated area) Then, a rinse under tap water high pressure. then a final soak in distilled water. Let dry on a cotton towel. Never rub the coin. This may or may not help. Good luck.
AS far as any variety is concerned, you can look here. http://varietyvista.com/02a LC RPMs Vol 1/1943SRPM003.htm The look of your MM if it was a variety would be an S/S west. There is multiple things going on with your coin. Possible die deterioration, Struck thru debris, environmental damage etc. I would spend some time going through this site to help familiarize yourself. http://www.error-ref.com/ All of these things I have pointed out can have an effect on the way a variety is struck.
