I was afraid that after my recent purchase of BSSM I would no longer find any British saws... Here's today's flea market find: After cleanup: It looks like the handle has been attached at an angle. The screws have been tampered with, and an iron screw added. I believe the back should be aligned with the top of the handle. Would you agree? As for the age, I am not sure. BSSM shows no spring steel, and the use of John seems to continue after the addition of Jackson. Would 1850 be reasonable?