Thanks gentlemen,
Agree with both Detlef and Alan that its
origin ( yepp, sorry for the mistake but that was what I was aiming at) could be Madura / East-Java because of the mentioned features.
Will show proper pics after receipt of it but it might already be interesting to observe the similarities of my keris compared to a Megantara keris: the fuller in the mid reaching almost towards the very tip is remarkable.
By the way, English is not my native language and 'worse' I am a female collector
