Those appear to be the M-Birch model. I am not a Mapex expert by any means, but I do have the Pro-M which is Maple. The Mapex description for the M-Birch is:
"Mapex M Birch has established itself as a worldwide favorite. One hundred percent birch shells, a beautiful exterior ply of maple, striking high-gloss transparent lacquer finishes..."
According to the Mapex catalogue for 2008 that badge would indicate the M-Birch series.
Good Luck they look great and should sound great.