I love to collect jewellery books on different designers, ages and materials; and I just happen to have this book on Haskell jewellery in my collection. I would recommend it as well - even if you have no Haskell pieces. As it looks at the designs and different eras with loads of jewellery photographs. Its not a bad thing to read about all types of jewellery as it gives you a much more over view and education. Very handy when you are trying to date or identify many pieces.
It called Miriam Haskell Jewelry by Cathy Gordon and Sheila Pamfiloff.
Back to this dress clip - well it is of faux glass pearl beads, some dangling and some arranged centrally. Then there is a pot metal leaf that has small diamante accents. The clip back is plastic with a metal clip mechanism. Here are a few "back" pictures that are very important when identifying jewellery.
Cathy and Sheila's Haskell book shows not only the fronts but the back view as well - Hurrah. Much easier to see if the construction is the same - although the photographs are a little small for my eyes now!
Yes the construction seems to match with the plastic base and metal shaped clip that Miriam Haskell's company used. Couldn't find the actual dress clip but the book showed a similar construction but with blue beads. Sorry can not show the pages I looked at in the book - so you must buy it yourself and see.
So I actually do think this is an early Miriam Haskell dress clip. What do you think? Yes its in bad condition and I have done nothing to it. No cleaning or repair. Yes I am keeping this one because its history and from WW2, so its not for sale. Might even have a go at restoration as I have enough glass pearl beads from that era to use as replacements.