This is Strathearn's P21 Large Lace paperweight. A striking weight usually with eleven to twelve spaced millefiori canes. Size ranges from about 2.75" to over 3.0". Production was from 1965 to 1 May 1978. According to Dave Moir these (as with all of the Lace weights) were difficult and time consuming to make due to the delicate nature of the latticino strands. Yearly production is unknown at this time. These were also made in minature, medium to small, magnum, super-magnum and a magnum multi-faceted size. A number of these of each size were signed and dated.