Sword - Kaskara? - Comments please.

[longfellow]

I believe this is a Kaskara, but what I would really like to know is how would one date the piece?

There are no symbols or names or writing that I can find. It has a stamped (?) copper grip – the design is of diamond shapes with indentations in the center of each and the pommel is stamped a different repeating designs in each of the concentric circles on the top, as well as circles of designs on the side. It was displayed with 2 other swords on a wooden plaque – either a shield or device for displaying a crest and had a note on a small string tag saying '3rd crusade' and I always thought it to be a ‘decorator’ piece.

Length is 42", the guard is a hair over 6" wide, grip and pommel about 5 3/4" long. Any help confirming identity and age would be of help.