This 26 inch hand saw is die stamped PRYOR......I think, check the picture please. The back is straight as in no nib but if you sight down it there is a slight hump along the back. I did not find any reference to a Pryor as a maker. I would judge this saw to be circa 1860's, I see I left some dust for you.

For information on old tools the resources at Mid West Tool Collectors Association are top notch. They have links collected there for everything antique tool related.

https://mwtca.org/useful-reference/

Make sure to check out my other items, I will combine shipping just wait for the invoice. I am in a selling mood, it's not Christmas yet but schit has to go, offers is set to let me see offers that I don't think I'll take, might change my mind..........