Featured Miriam Haskell? Pearl Brooch

I nearly put this back on the table, then I spotted the metal frame with the holes in in that I believe is one of the ways to identify MH. Very cheap so no worries if not!
It’s large at 5.5cm long with glass pearls wired on to a frame.
Research tell me that between 1930-40 ish the holed frame was covered by a solid back plate and that early examples are not marked.
So could this be MH? Presumably other makers used this construction method too
Any other identifying signs?
The clasp is a replacement and there is only a fragment of the original left.
Thanks for looking

 

The front looks right but the back isn't anything of hers I've ever seen, not that I've seen everything.

 

And those pearls with the damaged finish will be a problem

 

I’m not too bothered by that, I just like learning about things. I don’t pay enough to be too picky

 

I’ve just had a thought that it was a dress clip that the clip snapped off rather than a brooch.

 

The pinback looks original. Those backs were used when dress clips were made; I'd bet it was part of a set of three, one pin and two clips or a set of four with earrings. The marks may have been on the other pieces.