Hi everyone. I am new to this forum. I need some help on identifying a future project I am looking at. My grandfather had an M or at least what I am perceiving as an M however it displays a 400 emblem on the side of the hood. It is definatley M style of sheet metal on the hood and grill. Why would it have a 400 emblem on the side? My grandfather has been long gone and my dad has always identified it as an M. Has anyone seen this before? The paint is still original and I can not see any evidence of the "M" on the side. The Mc Cormick Farmall lettering is the same as an M. I am really confused.