Several people have been in touch saying they own a Pandora watercolour (watercolor) print and requesting additional information and possible value.

I don't own one of these prints myself so can only report on accumulated information. Here is an example of one of the prints:

Value - I've seen them offered at Ebay and they have typically been sold in the $75-150 price range.

Pandora, 1896

Also worth mentioning is that Dr. Anthony Hobson, biographer of JW Waterhouse, wrote in his dissertation of two oil painting copies of Pandora, both located in the United States.