Hello all!
Do you think this model of a modern or made long ago?

At first glance it looks genuine, but on closer inspection (apart from it being a paper label), a few things don't look 'right'. The absence of the SHARP logo in the top left-hand corner of the label is curious. Also, I've been led to believe that the serial number on Sharp boxes contains the date of manufacture. The first number is usually the year (in the case of this box, it would be 85), and the next two numbers are the month (you can't have month 22). I have a box from a major manufacturer that has a paper label, and like yourself, I also doubted it's authenticity. But some boxes do come with paper labels, so the doubt is no longer applicable in my case. I'm thinking at this point that it is genuine, but do agree that it looks unusual. But it does look to date from the '80s. The GF-7700 seems to be a very rare model, I can't find many references to it, and no pictures, so I can't look at the back of other boxes of the same model to compare the label. Do you have a picture of the front of the box?