I don't think that it is for the dutch HJ and i doubt that it is original at all,you should reqyest photos of the back with clear shot of the pinplate and any markers on the badge.
Sorry to contradict but this is the youth badge for Lower Styria, Austria. If it had been for the Slovakian youth it would be red and white and made of enamel (the Styrian are always painted).
NS groups in this area that the youth would have fed into would be the Steirischer Heimatschutz later the Steierischer Heimatbund.
These are quite common pieces but often turn up mis-labelled.
Thanks for the welcome and for posting that link! For several years I have believed that the Styrian youth were directly connected to the Heimatbund but have been able to find any proof to my theory until this.