soundboard?

[Patricia Neely]

O.K I got no response to the question on reverse sound board, I was shown a
old upright on its back on a dolly  and was told that it was made with an
reverse soundboard it had a slight amount of sag ,instead of measuring it
from the back they measured it from the inside below the strings, remember
it is on its back. Does anyone have knowledge of this??????  Pat Neely