Micro Seiki MA-505 variants - any oracles around?


I wonder if somebody out there possesses encyclopaedic knowledge about the Micro Seiki MA-505 variants and can tell me:

1. if the MA-505X is similar to a Mk I, Mk II or Mk III?

and

2. if the MA-505X does indeed have silver wiring and if that's the only difference between it and the regular models?

Fingers crossed and thanks in advance!
agrippa
Uberwaltz, Hi- I built your table! Was looking up the 505X which I was not familiar with and there you were.
Hope the 401 + 505 combo is still making you smile.
I love the 505 because it is such a flexible arm and looks great to boot.
Best, Dave
totem, "arm found on Micro Seiki DD-40 turntable, still identified
as an MA-505 although different from the arms sold
on their own".

Other than the base for each arm, what is the difference?  From a quick look they appear to be identical.
totem, "arm found on Micro Seiki DD-40 turntable, still identified
as an MA-505 although different from the arms sold
on their own".

Other than the base for each arm, what is the difference?  From a quick look they appear to be identical.
I am curious to find out the difference as well.  Is it better? Worse? Etc.