Congratulations on owning such a beautiful keris. It's always a joy to own one where you not only have a nice, intact blade but also sarung and hulu aged to perfection, with that mature reddish brown hue.
At first glance, the blade looks like the work of a Malay pandai besi, but I can't help but sense something of a Bugis sensibility to the blade, which I just can't pin down. Any ideas why anyone?