This is Strathearn's P9 minature concentric paperweight (similair to the P13 minature star weight in design) and ranges in size from about 1.3" to just over 2.0". The great majority of these P9's have three concentric tows of canes around a central or center cane but sometimes you'll find a two row concentric design. These minature weights were made from around 1965 to at perhaps early 1978. Vasart also made this type of minature paperweight. These P9's do not show up in my May 1978 Strathearn brochure so they must have been discontinued at some date prior to May 1, 1978.