Collectable vintage 1960's Sindy clone doll - made in Hong Kong

I am not an expert on Sindy dolls - she could be an early original Sindy but I think a Sindy clone.  Nonetheless, these have also become highly collectable.  She is marked "made in Hong Kong" on the middle of her back and there appears to have been a marking on the back of her head but this is not at all legible.  She is 29cm tall with moveable arms, head and legs and twisty waist She is dressed in an old fashioned outfit which has been sewn in such a way that one would need to unpick stitches to remove (which I am loathe to do) She is in very good condition.    Refer images