I admire your forethought by presenting them clamped in a saw sharpening vise.
I'm not into saws. I have a few, inherited from my old man. But I am a big fan of Disston files and file & tool handles, vis-à-vis my WWII collecting, and the fact that I was born and raised in the Poconos.
I won't bore everyone, and I don't want to sound like a broken record (I've said this before), but if you're into history you should read up on Henry Disston. Beyond the patents and the industry leadership, etc, he was a very progressive person. The history of the company is inextricable from the Tacony historic district and all of northeast Philly, really, which was developed by Henry as a company town, completely populated by employees, that was eventually absorbed by the city. All the houses, schools, churches, and many other businesses - to include pubs! - wer built and thrived because of his ideals, philosophy, and planning. He was an amazing man.