2 coil taps. The story on this guitar is Wolfe ordered it and the customer declined it for some reason so they built ands delivered another, this was a very specific guitar probably easier to gift than find another buyer.
I use (2) palmer PDI-09 boxes, record both guitar players live direct. you simply plug the amp output into it, run the speaker cable from the box to the cab. The Palmer has an XLR out to PA/Mixer
https://www.toursupply.com/product-p/pdi09.htm
Under Plaza all Millennium models got lumped under the 155M model. They were trying to production run the Pro which had VERY limited units in the golden era featuring the sharp horn... All featured the previously mention Solid hollow design, Plaza removed the figured maple front and back specs with the 155M design.
Skydog had a nice VO Pro... Maybe he will chime in
My NOS Pro. https://www.gbase.com/gear/heritage-millennium-pro-ssb-sunset-burst