Gentlemen, Pictures of an early saw was posted to a Facebook vintage tool group yesterday and it spawned a flurry of discussion. The owner hasn't found a stamp or marking on it yet, so lots of guys (including myself) tossed out some possibilities. Perhaps the learned gentlemen on this list will be able to identify it right away.
Without a name you're just guessing on the manufacturer, date, or even the country of origin (which is fun, but totally unreliable) Some comments; I have those same cone shaped iron screws on saws from Taylor Brothers (an etched Sheffield saw from c 1880), and from Willmot (New York, c1850) The handle shape with the sharply dropped top is more common on my English saws, (but could be American). The blade looks in good enough shape that any stamped name would be at least partially discernible. So maybe it was originally etched i.e. not a really early saw The handle could be a replacement. If it was the original handle I would have expected the top of the blade to be visible across more of the top of the handle in the top picture, instead of disappearing from view just after entering the handle.
I seen quite a few *like* it, but never a right-angle before ... excepting perhaps one S&J I can't quite recall now.
I thought it might be a Spear & Jackson also. Mike Stemple has a picture on his web site that is very similar. It also has the sharp right-angle at the top and the stumpy nub in front of the upper horn.