Hello Henk, Thank you for the help in identifying this item and for the great story!
Unfortunately the only teacher that I had an interest in anything even remotely like ours collected swords and daggers from a certain German Military faction that I do not feel comfortable in mentioning. While my wife likes to make fun of my collection she does from time to time surprise me by adding a few new additions to it herself. A few years ago I had the chance to acquire a trophy skull but like your teachers mother, that is where she drew the line. I will not go into her line of reasoning for my not purchasing said item but needless to say it was quite convincing.
Thank you again for your help.
Regards,
Robert