This is another of Strathearn's Arctic Range of paperweights and this one is called Force One. There are four pwts in this Force series where this Force One has a single layer, the Force Two has two layers, the Force Three three layers and the Force Four four layers as shown in their respective albums. Each has a blue, green and white ground similiar to that of the Arctic Floe P30 weight but these Force series have five placed bubbles in depressions made in the ground. I have no other description for this pwt series. As far as I know today, this is the only color range for this Force One pwt and there is only one general size range which is Large. Yearly production is unknown at this time. Circa 1970 to 1979.