Unique picture! Have not encountered this before. The one on the right appears to have
the early style glued-in drivers, a la Model One, Two, Three, Four, and Six. These were
apparently built as KLH was shifting to removable speakers. The Seventeen came later
and never used the glued drivers, but it looks like cabinets were the same size.
I would like to also see the rear (terminal plates and serial numbers).