Hello Geoffrey,
Only the beautiful handle is of Madura origin. The scabbard is of Central Javanese origin and old, in the Jogya gayaman style as is the nice pendok.
I am unsure if the blade is indeed Karmadikan, it looks fairly old to my eyes and I guess as well a Central Javanese origin. So only the handle is Madurese IMO. I guess that others will chime in and it could be that there are other opinions about the blade!
Regards,
Detlef