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It looks like Hebrew alphabet, רִיקִי "Riki" (or "Ricky"). Note the position of the signature on the canvas – in the bottom left corner, in Hebrew it's "the end of the text" position since they write right to left. The European painters usually sign in the bottom right corner, in the European "end of the text" position, because Europeans write left to right. When the painting is finished, as the last stroke the painters put their signatures, thus finishing the work.
Also, a dot beneath a letter is typical for Hebrew, such a dot is called Hiriq and denotes the [i] sound, like in 'sit', 'pin', or 'give.' And yes, that is very likely hamsas in the outer border.
Unfortunately, I have no idea who Riki/Ricky is or who signed paintings like that.
Upvote:0
An image search of both the signature and poster didn't provide answers - but turned up a lot of Aubrey Beardsley's work - and this artist is obviously influenced by Beardsley. Of course many 60's artists were also. Might be worth contacting a gallery who specializes in '60s posters and other art. It is a fascinating piece. I'd love to know more.
Upvote:4
The accepted answer seems to be correct about it being Hebrew, though in my (extensive) experience the choice of location for a signature is fairly random even for an individual artist.
That work was done by Riki Ben Ari, an Israeli fashion illustrator active in the 60s through the 80s (or beyond?). She died in 2007. An obit. stated she was "The high priestess of fashion[...]" in Israel.
Not a lot of imagery available, but below is an example, albeit signed using the "latin alphabet" (source)