Here is what I can tell you:

• these are ex Bileski and are MNH 
• he called them 1914 Winnipeg Cinderella Poster Stamps
• there is a writeup from him, excerpts are as follows:
  • there appear to have been only 30 of these sheets left in existence
  • they were printed in 1914 for distribution in 1915. 1914 was a desperate year, vast unemployment and little business anywhere but by 1915 it was quite different
  • this is why he surmises that none of these labels were ever used and that the 30 he got were the only ones left
    • Note I have received word from a fellow that he has seen some of these on in period envelopes so some must have been used
  • I will include a copy of the writeup with the sheets
• 2 sheets (or 6.6% of all that may exist) are in this lot
• one is 3 labels by 4
• one is 4 labels by 3
• The sheet of 4 x 3 has been folded along the perfs and will be shipped that way.
• The pictures represent the stamps in this lot. The pictures are of one of the lots, all of the lots contain the same stamps/configuration