I also noticed IVI markings - is it an abbreviation? And what is this box for? I found no place where I could mount it. The stud fits in a hole on the arm but there are not threads of holes for screws. I thought it could be s spare parts box or so but Im not sure. And some more pictures of the bobbin winder. The spindle for the thread roll is missing as it seems. So this is how it look temporarily assembled - I have to buy some nuts + bolts