[Monster]

The RG517 was part of a run of non-standard numbered guitars that happened in the mid 90's, During this time there was a sort of reshuffle around which trems and pickups and such the standard 550 and 570 were going to receive in the long term and such.

I believe there were RG505 507 517 and 527's available along with the underrated RG570 MHSOL, a solid mahogany natural finish RG570

hope that helps but some pictures might help me more with more info for ya...... but i do know they were limited run..