Once I removed the tote, I saw that this saw plate had been punched one more time than necessary, and it dawned on me why I could find no hint of any etching on the plate. I don’t have any reason to suspect foul play; I imagine there was a saw tote in need of a saw plate, and these two were joined (actually, I don’t know that the tote is off of an Atkins saw; perhaps they just had the medallion, nuts, and screws).
Here’s what the black crud left behind after soaking something in Evapo-rust looks like:
A couple before images of the saw tote:
How exactly is TPI supposed to be measured? When I count the teeth between the gullets that fit within 1″, I count 9. The mark on this saw says 10.
For the sawyer with sensitive hands, I went a little crazy on this one, and sanded it up to 1500 grit.
All cleaned up: