Here's an interesting Series II (SN:75 241)


 
 
Looks to have a Superfilter on board in addition to the standard electronics.  
 
More pictures and info here:
http://www.elderly.com/vintage/items/55U-3408.htm

Hi Jeffrey, welcome to the group!  Yes, we've talked about this very intriguing and wonderful bass before.   Some previous threads are here and here.

Whoops! It occurred to me after I posted that I probably should have checked for other threads on the instrument. Oh well.

That's ok; I love looking at this bass!!