Definitely Tappan
I had this same microwave in the U.S.-spec, Tappan-badged version. Very reliable and I had it well over fifteen years. The reason I got rid of it was that the outer housing of the U.S. version was wrapped in Ye Olde Fayke Woode Graine vinyl, as most American appliances and tellies were at the time it was produced. By the '90s, it had become a stylistic embarrassment.