It's a a replacement pickguard made by WD. I was just on their site and thought this might look cool.
Invalid Link Removed
MM's were made with Mustang bodies and spare parts to my understanding. Those included strat pickups. So this one has been replaced.
In my humble opinion, 99.75% of the time black on black is the worst combination.
I've only seen it work with shiny new bodies, and the white on the 3 ply made red.
Although, I love tort on black, you may want something not so "done to death".
I have a black/tort Axcelerator which is beautiful, but this is what I did to my MM.
057912