so what is it? and whats the switch do?


Coil tap.
:13:
Based on the headstock shape, which is like mine, it looks to be a Precision Guitar Kits build.
Nice fat neck then. I love that profile.
Kent makes a good P90. Didn't know he offered a tapped model.
Are you positive LLL is correct and the switch is a coil tap, or might it be a bass cut?
Have you looked inside?
One of the best sounding / playing axes ive had in 45 years and i love the aesthetics.
How does it add top end shimmer, if I may ask?
And, while it isn't a tap....boy that sure makes it easy to order a Custom Shop P-90 that can be tapped from hot to vintage! Just sayin'....think about it.