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
@br3098

MA-505 Mk III - 9" straight tonearm w/ copper wiring. It was designed to mate with very low compliance cartridges which were all the rage in the 1980s

CORRECTION: It’s the other way around. This is the arm with 7g effective mass and tracking force from 0.25 - 3g. I believe it was designed for HIGH compliance cartridges in the 80s (not low compliance), but tonearm can support a cartridge even with 4-16g selfweight.

P.S. Another interesting arm made by Micro Seiki for Luxman is TA-1 for high compliance cartridges. Static balance system. Cartridge weight range 2 - 16g, tracking force range 0 - 3g, effective length 240mm. Antiskating adjustment, cuering system, arm-base stabilizer. Made in the 70’s by Micro-Seiki for Luxman Corporation (Osaka, Japan).
chakster, you are correct of course.  My bad.  I meant to say that the MkIII tonearm was designed for HIGH-compliance cartridges.

Thanks for the catch.

BTW the arm on Pioneer Exclussive P3 and related top of the line Pioneer turntables was also designed by Micro Seiki and has some similarity with Micro Seiki MAX-282  
Just to add to the variants of the MA-505 is the 
OEM arm found on Micro Seiki DD-40 turntable, still identified
as an MA-505 although different from the arms sold
on their own.