Bill, you have a real winner there.  I notice that the board with the
label appears to be different from the rest of the box.  Since I find it
hard to imagine laying one's hands on a homeless label, I wonder if the
original box got badly damaged so that the owner build a new box,
keeping the panel with the label.  Your 48 has the old style of handle
(Scott G probably has something to say about that), and the leaflet
shows other planes with the same, as well as the floral castings from
the early days. 

$40?  I'll give you $50...  Yeah, fat chance. 

Mike in Woodland