This is Strathearn's Large Carpet millefiori or Closepack weight. The number of canes packed into these weights can range from the 70's to well over 100. The sizes range from 2.70+ to over 3.0". I don't know at this time when these were discontinued but I have a copy of a Strathearn brochure/catalog dated May 1, 1978 and they are NOT listed as an actively produced weight so I would suspect that they were produced from 1965 until probably around 1977. They always have a colored ground as I have not seen one this size on a clear ground. As with many Strathearn weights it is not unusual to find earlier Vasart canes among the Strathearn canes in these weights. While in production this P14 series was extended to the PP14 and PSF142 series.