OK ... here's the topside of an installed '51P control plate. it has seen about 18 months of action in a bass I custom built as a design prototype, but still is in reasonable condition all things considered. the top side has a nicely polished chrome plated surface
this image shows the two mounting screws removed, and their countersunk holes. this is the main difference between a righty and lefty from a physical design perspective
here's the flip side of the typical control plate I use. the chrome plating isn't as detailed as the top side ... actually this is quite good compared to a few parts manufacturers out there who have a dreadfully awful finish on the back side. note that there is no countersink to the mounting holes on this side
if you purchase a control plate with good chroming on the back side, you'll need to utilize dome head screws to mount it with vs. countercunk screws like most everything else utilizes. it'll look a little bumpy when viewed up close, but nobody will be able to tell the difference from 30 feet away. when I have the lefty control plates made, they'll have the correct orientation for the countersinks ... a small detail, but significant to me and my building efforts
all the best,
R