Got a 5.5 TPI (filed rip) saw the other day. unremarkable, but google
doesn't show much about it. I plan on using it as a testbed for
practicing sharpening but wanted to do my due diligence in seeing
what I have.

The etch is all but unreadable, but it LOOKS like a circle border, with
the words "The Guinea Saw" inside. Also inside are 2 other circles, next
to each other. In the left one is some sort of shield, like a heraldric
display, and in the right one is what appears to be the bust of a man in
profile, dressed in ... Grecian (?) garb. Like you would see a bust of
Caesar or something.

Beyond that, I can't make much out.

Any clues?