Thanks Jim for your comments....informative ..as ever
( Its about time you wrote a book
..or have you already?)
It is a shame that I have no history for this sword.....I can tell you the seller states that it was found in a very old house ( built around 1600) whilst being renovated, because of the '1730' engraved on it, he decided to hang it on the wall ...as 'period' decoration.
The stamped dots and double, inverted 'C' seem crude and old.....have you ever come across similar marks??