Window Sash

I've scoured this label, and just about the only coherent code I can pull off it is "H. D." It's possible that this stands for HD Supply/Home Depot. If it was HD, the company would have been restructured in 2007 and has changed ownership a few times. Now, I have absolutely no idea if "H. D." means anything at all, so take this all with a grain of salt. It could also simply stand for "heavy duty" if the window uses heavy duty glass. The other codes don't seem to tell us anything.