Just got this baby and can't wait to find out what the top is.  Speculation that it is Zebra Maple, however the wood grain is broad and dark.  
 
Please provide original build sheet and any other info.
 
Thanks.

Dennis,
Congrats on its on-time arrival.  Enjoy and Play it Healthy!
Art

Hi Dennis,  
 
Here's what I found in the instrument file:
 
MSB-I Series I 4-string bass
 
top: Zebrawood
body: Mahogany
back: Zebrawood
neck: Maple and Purpleheart
scale: 32 medium
fingerboard: Ebony
inlays: mother of pearl
peghead veneers: Zebrawood
originally made for: not recorded
birthday: November 17, 1980
 
That's all there is to report.