Vintage Fred Harvey Railroad Coffee Mug set of 4

These are made by Jackson China who made restaurant China. There was a movie made about the waitresses on the mugs called Harvey Girls staring Judy Garland. Fred Harvey was the owner of Railroad Depot Restaurants called Harvey House from 1908 to the 1968. There was 4 drinks to choose from Coffee, Tea, iced tea and, milk. His waitresses were recruited from around the country, they had to have a certain height look ect. One of these sold in 2010 for $70 and more recently one was purchased for $125. They are very rare but to find a set of 4 with no chips or cracks is unheard of. The code on the bottom of each mug is O11 which stands for a month and year. Look into these on your own to see how rare it is to find just 1 of these.