Homer Laughln Fiesta Tableware Fiestaware Cup Red Faintly Incised HLC fiesta USA

Homer Laughlin Co. Fiesta Tableware Company Fiestaware Coffee Cup Red Incised HLC fiesta USA  These cups are available singly - at time of listing I had 2. Best I can tell from my research is that these were probably between 1960 and 1986, based on the incised stamp. However, I am not an expert, and if you can point me to a reliable source that says these are post 86, I'd sure appreciate it and update my listing. I also listed another 2 red fiesta cups which look just slightly lighter red and have a more deeply incised mark, unknown if they are same date or color, but similar mark.   * mark is incised, or imprinted, rather than printed  * mark has a lowercase f   * mark does not have an H or any codes that indicate year or color  * cup is smooth on the inside - after 1960 this cup style did not have inner rings  In very good condition. See photos.  WE QUICKLY RESPOND TO ALL OFFERS.