The Yamaha AN1x Synthesizer mailing list

I just picked up a used AN1x in great condition.  This particular 
unit has silver rotary knobs, and not black ones like I have always 
seen on the AN1x.  They don't appear to be spray painted or otherwise 
colored by a previous owner.  Did some units ship with silver knobs 
from the factory?  I can only imagine so.  Also, the knobs are 
identical in shape to the originals I've seen on another AN1x.  I 
know this is trivial, but I'm just curious about it.

Also, the power supply is a very "substantial" unit itself, 
consisting of a very heavy transformer with the barrel connector at 
the end of one cable, and a regular 2-prong power cord coming out the 
other end (and not a wallwart power supply).  Is this the standard 
power supply that shipped with the AN1x?  A friend with an AN1x told 
me that he just had a standard wallwart power supply that came with 
his AN1x.  Again, just trivial, but I'm curious.  Thanks!