[Harp-L] questions re Shure 545S mic

[Captron100@xxxxxxx]

Can u guys and gals help me, pls?  I just bought a used Shure  545S, Series 2 
mic. It says, "Made in the USA".  What is meant by Series 2?   
I find this mic somewhat uncomfortable to hold, due to the  imbalance caused 
by the heavy metal bottom part that holds the  switch.  The 545S is the mic 
that Butterfield used, but i've learned  that there are a few variations.  Did 
Butter use the same one i have, with  the heavy switch encasement? 
  I've learned that this mic should be wired for high impedence for  best 
performance.  I removed the switch to have a look.  In the metal  behind the 
switch are the numbers 32 598.  There are 4 wires coming up from  the bottom, 
which are neatly and professionally soldered to the switch -  red, white, blue and 
black.
  Is there a way to date this mic?  The seller said he thinks the  mic is all 
original, but i'm not sure about the wire.  It is a 4 pin  Amphenol brand 
connector to the mic, and a 1/4 inch Amphenol connector on the  amp end.   Does 
this sound like the original wire for this mic?
  I've searched the archives, the Shure website, and G's great  website, but 
still can't find clear answers to my questions, the most important  of which 
is how to wire this particular mic for high impedence.  Maybe  it's already 
wired for high impedence as issued by the factory?  
  Also, how is the grill cover removed if I need to clean the  screen?  Might 
the mic ever need to be disassembled, and if so, how does it  come apart?
  So many questions, so little time.  Many thanks in advance, 
ron