Pre serial number.....60-63.Try Mostenbockers lift off or graffiti remover.The stuff works great and dosen't damage the wrap.Be sure to plug all the mounting holes and the grommet hole to prevent getting the stuff on the interior of the drums.Steve B
Motsenbocker's looks good. I'll give it a try.
http://liftoffinc.com/index.php
Thanks
Jim