micro seiki ma-505x


Anyone know the significance of the x on the 505 arm? There is one for sale, and I wrote the seller and he didn't know the meaning or significance.
Thanks
rnadell
I think he might mean 'S' rather than 'X' in which case it means 'Silver Wire Version'.
Dear Rnadell, the "x" features silver inside wiring and a second counter weight. Cheers,
D.