Well, I really need to get a new bass in the shop and this piece is far too heavy/precious for me to get out with around my hometown.
The head is switchable to 150/300 watts (hence the 25/50), the cabinet is 8ohms and just shy of 55 pounds.
I believe the Jubilee series had one year of production with the 4 space rack cabinet and matching silver cabinets (1987). I'm the second owner, it has been babied and is in pristine condition for its age.
Individual prices:
Marshall Jubilee Head + 4 Space rack case: Sold
Marshall 15" Jubilee bass Cabinet: Sold