I checked the tapedeck site to see if they had one of these in the list of cassettes and they don’t, so I sent them some photos.
I have 3 of these Teac cassettes and I can remember that when I bought them that they were pretty hard to get hold of back then. Now, well I doubt that there would be many of them around any more.
I’ve only got one of the blue ones and the other two are black and not in as good condition.
Beautiful though isn’t it?