I recently purchased a 1915 Craftsman Bungalow in Wallace Idaho.  Were keeping most of the kitchen which we think was remodeled in the 1940's.  I did tear out part of the kitchen wall that held an old wall oven.  The wall was made of 1 1/4' thick x 8' x 3' fir plywood.  This stuff is in great condition, tight grain and has 13 ply's in it.  Not sure what I am going to do with it, but I will find a use.  They don't make it like they use too.

Gregg