It's more unusual to find a coronation sampler that comes with a maker's name. The description given with this example:
Sampler made at school to celebrate the coronation of George V1 the father of our present Queen who unexpectedly succeeded to the throne on the abdication of Edward V111. The emblems embroidered represented the British Empire at that time.
Size 15x10 ins
I wonder where the school/teacher found the design, and how many pupils completed it. The blue background is less common than a pale one. The lettering could have been altered from ER to GR, Edward to George, as was done with other designs. There are other designs for both George VI and Elizabeth II that feature the animals representing Empire/Commonwealth nations.
If you know any more about this design, please do leave a comment.