Mikensharron's thread "Not WMF Ikora. Id please - could be Fenton?" reminded me of this piece from a long while back, which I also feel is WMF Perlmutter (mother of pearl). Again, to summarize an overblown discussion from back then, WMF pieces do sometimes have pontil marks, some of which, on occasion, are not extensively finished. Unfortunately, until someone develops a definitive authoritative reference on Perlmutter, we may never know. However, perhaps the best test of legitimate attribution is cash: if these pieces were for sale, attributed as Perlmutter, I would be willing to lay my money down and buy them as such.