Help ID Dragonfly pin?

[Butter Hat]

Can anyone ID this dragonfly pin? Sorry for the bad phone pics....

Got it at a yard sale years ago, just wanted it for myself, no thought of reselling.

There's no pin in the back. The seller went to look in the house for the pin part, I got tired of waiting, so I just paid as-is and left.

I was just looking at it today and there is some sort of mark on the back. It got me curious.

The pin looks like a modern interpretation of Art Nouveau. But does anyone know what the mark might be?

Front

Back

Thanks!

 

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[Metro Retro]

It's Liz Claiborne. Very nice.

 

[Butter Hat]

Thanks! I searched a lot of sites but could never match the signature.