Well Used Disston Panel Saw

I found this well-used 21", 10 PPI Disston panel saw in my basement (not sure when I got it). It's been cut down many times, as can be seen. The Disston etch is partially visible, but some of it is cut off at the bottom. I'm just curious which saw this might be. The etch has the wider margin (the older style), and the medallion is the 1896-1917 style.

Thanks for your opinions,
Dave