LOETZ TANGO COFFEE SET, MARKED

Five days ago, I posted three Loetz demitasse cups, all marked, and remarked they were different in size and shape[Pic. 1: Left: 2" tall; right: 1.7 tall.] to a set I already had.
The set [ Pic 2] originally consisted of 5 cups and 6 saucers,all marked with the Loetz oval mark [pic. 3], and 6 plate serviettes embossed with the Sheraton Hotel logo. I found a 6th marked cup and a marked creamer/sugar set. Then, I found a suitable display stand.
I also found quite a bit of documentation [Pic. 4]. Though the handles on both my shapes are rounded, it also shows cups with triangular ones, which I have yet to find so far. I've also seen enameled cups, and one in a color I am missing: yellow.