I have an unrestored Hupfeld Phonola Vorsetzer.  My question concerns
the height adjustment to align it with different keyboards.  There are
four square bolt heads visible which would seem to do this, but the
countersunk access holes in the case are too small to fit a socket.

Did the Phonola Vorsetzer come with a special wrench for this adjustment?
If so, maybe I could make a similar one.

Philip Jamison
West Chester, Pennsylvania