One question--what leads you to your estimation of this sword's age?
Thank you Andrew. Have discussed the sword with a good friend who is a great expert for swords from mainland SEA, he seems to be sure that it is a 18thc sword. Second the age estimation from Ian in this thread: http://www.vikingsword.com/vb/showthread.php?t=19121 post #4. The wear of friction at the handle is a further point.