Near to all pictures of the Chinese predecessor of the Pug show a short-headed, round-eyed little dog with short, chondrodystrophic legs. It is often piebald, sometimes black with white signs and sometimes brindle. The fawn color is seen below in two Chinese Pugs. In one if them the tail is visible and it is a bobtail. In the paintings (that are older than the photos) the tail is slightly curved.
The two dogs below were owned by Mrs. Lancelot Carnegie and the person on the picture is her maid Shen Ah Nu. The photo was published in the book The Pekingese, 1912.
Renée Willes writes about the photo below in the book Allt om mops that “the black Pug with white signs also came from China during the 1910s and the type of dog was called either Happa Dog or Peking Pug. The white signs were called the Chinese heritage by the breeders active around 1900 and they were seen as a good sign that it was the real deal in the lineage” (Willes 2006: 112, my translation from Swedish).