Most of the old MG's started with the number 251.  Numbers below 251 were
protatotypes.  Later on, numbers started at 101.
On Sun, 15 Dec 2002, William Donzelli wrote:
   Which would
indicate that several thousand were produced.  
 Many (most) manufacturers do not start with s/n 1, thanks to the
 marketing people.
 William Donzelli
 aw288(a)osfn.org
  
 
M. K. Peirce
Rhode Island Computer Museum, Inc.
Shady Lea, Rhode Island
"Casta est quam nemo rogavit."
              - Ovid