Alan,
You're completely right about the gayaman wrongko. The gayaman style originates from many places indeed with minor variations. I do remember the thread about the maduran wrongko's.
When I look at the last picture of the scabbard on the place where the wrongko changes into the gandar I see a line and discolloring. Same for the picture of the frontside of the wrongko. Also there I think to see a discolloring. That gave me the idea of a missing pendok. But I could be mistaken by the light in the picture.
Classifying a blade to a tangguh is the most difficult thing to do. I also prefer not to make such statements.
Emanuel,
A false Pelet is made with paint or a kind of ink. I'm not quite sure what is used for it. I do own a keris of which the scabbard is also painted in Pelet. On both sides
When I cleaned the scabbard with wax remover to remove the dirt and old wax layers the cloth colored in the color of the Pelet spots. Using a clean cloth and rubbing over the wood nothing happened, rubbing over the pellet spot the cloth picked up the color of the Pelet.