No disrespect is intended (especially to Bernard), but the only mention in this thread on identification of this piece to John Walsh Walsh is Bernard:
"Yes, that floral / leaf pattern is a well known Walsh pattern, known in mother of pearl and other types of Walsh glass."
I have the mentioned book on Walsh Walsh (by Reynolds) and I have looked through it several times (the last time just now) and I saw no spot pattern that was the same as in this vase. The spot pattern starts as a mold. Even after a piece is manipulated into various shapes, that same spot pattern can be still identified. Manley actually shows the same spot pattern in his book. Yes, I know there are some off-the-wall identifications in Manley's book, but who is to say that this is one of them? Is there anything in research materials that states that "only John Walsh Walsh had this mother-of-pearl irridescent' coating" There are companies in the US that have made a similar irridescent finish over the top of glass and it is done by spraying mineral salts in a liquid solution over the piece when it is still hot. (same is done to make carnival glass with a different mineral salts formula). Who is to say that either Richardson or Webb did not do the same thing? Especially Webb, who had the mold in later years. Companies copied lots of designs, patterns, and glass treatments that they saw had a good market. Lots of companies figured out how to make glass look like their competitors glass. I would love to have this mystery solved, as I am a big fan of John Walsh Walsh. I have had pieces with this mother-of-pearl finish in my collection. I also have pieces by John Walsh Walsh (in an opalescent spot pattern known as OPALINE BROCADE, a famous documented pattern) that do not have that finish. There are several pieces in the Reynolds book that show the mother-of-pearl finish, but NONE are this spot pattern.
(side note on other companies copying patterns: Northwood stole the OPALINE BROCADE pattern from John Walsh Walsh. Walsh Walsh introduced it in 11/1897 and is shown in an original ad from POTTERY GAZETTE in Reynolds' book, pg. 13. Northwood introduced it in the US in 1/1899, just 14 months later).
I would love for someone to show me either Manley was wrong on this particular identification, or to have someone point out the page and picture in Reynolds' book that shows this is an identified Walsh Walsh pattern. The majority of the Reynolds book is reproductions of the original pattern books, and I may have missed it, but did not see it. Also, if this pattern is such a well known Walsh Walsh pattern (and it seems to show up with some frequency on ebay), you would think Reynolds would have included some mention (or even a photo of) this pattern.
Mr. Vaseline Glass