Black with black pole pieces. Metal baseplate.
Pulled this from my Apex 100. It squealed when I got it in there, but there's every possibility that could have been my wiring. I'll let it go for £20 + p&p for an MG member as I'm not sure if it is microphonic or not.
Refs: here and BlankPlank91 on eBay.
Hey dude, if you can wait till friday I'll have it off you!