Thank you Alan for your thoughts about the blade in question and your very detailed execution.
When I first saw the blade, I was very sure that it was West Javanese or South Sumatran.
After I receive it and hold it in my hands I get my doubts.
I would go with Gustav that it is a so-called "Chenok" blade.
Again, thanks to all who contributed, it is/was a very interesting discussion!
Regards,
Detlef