The base is unsigned designating this bottle as made between 1973 and 1982. It has the requisite center cane and four outer rings. What is most interesting is the exact reflection of the base design that can be seen from the side and above, a perfect image to add complexity to the bottle itself. I have tried to show this in my final photo. Magnification is superb for this characteristic.Cane choices for this particular bottle are wonderful in their contrast to the blue base. It is unclear how many of these bottles in varying colors of ruby, blue, or green were actually produced. The item "Perthshire Paperweight PP22 Blue Scent Perfume Bottle withStriated Stopper EC" is in sale since Saturday, November 1, 2014. This item is in the category "Pottery & Glass\Glass\Art Glass\Paperweights". The seller is "paprwt" and is located in Northbrook, Illinois. This item can be shipped worldwide.