Variations ranging from the run of the mill sword to a gift fit for a general would be appreciated. Although it says 1650 any period from 1600-1700 is acceptable.
It really spends on the quality of the metal and how intricate the designs happen to be. To make an uncomplicated short sword of that era, it would've taken around a week. Most of the information provided given the length of sword making is from the medieval/ renaissance ages respectively. I think the best answer would be a month for a long sword, and then any number of weeks for the decorations, depending on how much you add.
There's some information regarding the reconstruction of many swords on this web page: