Marcus shows another example of a variant vase formed by swinging like this in Sklo Union Art Before Industry (top of page 133 for those who have a copy). Marcus states that a vase which starts out of the mould at 200 or 250mm can be swung to twice that length. He also says that every one will be unique as the swinging process produces something slightly different in every example, and that "these items are relatively uncommon."