Aquarian 12" American Vintage Medium Weight Texture Coated Tom Head, VTC-M12, a Coated, single ply drumhead, medium weight, the American Vintage series has a slightly larger hoop diameter to allow for an easy fit on most vintage drumshells, this drumhead features a special coating that has the look, feel and warm sound of a calfskin head,
This is the best head i've found for replicating those great sounds of the sixties.
I find it works best on vintage drums and really brings out the tonal qualities of the shell, and due to being slightly oversized, has a much better fit on those older drums.
The only slight downside i've found is with durability. Dont get me wrong, these things will take an absolute battering, but compared with your emperors and pinstripes, they will fold a little quicker.