Ron----That is a beautiful weapon, the wood in particular.
I'm guessing that it may date from the second half of the 18th century. Do you have any idea of the builder?
I've been in the Armory area of the Doge Palace in Venice a couple of times. They have a great collection of arms and armor. Naturally, the Doge's troops would have had the best and most decorative arms. The must have tried to dazzle their opponents on the battlefield into submission rather than actual combat. I think the Italians tried that in Ethiopia in the 1930's, but it did not quite work out for them.