Thanks for the kind replies everyone!
Mark aka sawnuts, I don't know much about the "Challenge" on the ribbon or banner, but if I were to speculate it might have been Richardson putting a challenge out to other saw manufacturers to produce a better saw than they were making. I used the SWAG method to come up with that!
Some of these makers have little information out there to go on. Wiktor (wkfinetools) has some good information on his site but nothing really about the Challenge meaning.
Joshua, if you believe that's the saw find of the year, that means something to me, as I know you see quite a few tools in your neck of the woods.
Pedder, I'll see if I can get the handle scanned in the future. My 88 year old mother has been in the hospital so that's the reason for my slow response here.
Daddo & Admiral, This saw hailed from around the Milford, Connecticut area, at least that's where the seller was from. I did a little search on the Seymour name and there was a prominent family in that area that appeared to have some wealth. I'm sure this was a pretty expensive saw in it's day, one that I'm sure not every Tom, Dick & Harry could afford. By the looks of it, it lived a pretty sheltered life but as to where and what in, I'll probably never know. It is pretty amazing a saw that's more than likely 140 years old can survive in this condition.
I also did a little search when I first bought it to see if another one existed. An earlier Richardson No.15 turned up on Matt Cianci (used to go by Mattsworld on here I think)
site . The only thing is it doesn't have a Rosewood handle?