Ok, well maybe not exactly 1899, but the materials are from a piano of that period. Wing &Son, New York. The most recent patent date I could find on it anywhere is 1899, and the company halted production in 1928, so it's in there somewhere. I've never owned an SG, and not sure if I ever even played one, but the old piano is mahogany and mahogany veneer so this is finally the time... Sadly, I don't think any of the spruce will be usable for anything.