I can only add that it seems to be a nicely carved reproduction, which is not always the case with this dress form in modern times. If it had a sincerely older blade in it i might not have questioned it, especially with the old mendak attached.
The combong at the sogokan is a dead giveaway that this is a contemporary blade since it does not show any actual wear in other parts of the blade that would be associated with the formation of such erosion in this one spot.
I do like many contemporary blades, but don't appreciate when they masquerade as something they are not with added aging such as this combong.