There is one cane in that Salvador Butterfly weight that is quite often found in Paul Ysart's work. It is the black-centred orange daisy with translucent yellow outer.
This is an example of a cane that was pulled in the 1930s and "shared" between Salvador and Paul. It appears in several of Paul's weights that are dated to the 1930s and also some post-war ones. It also appears in a number of Salvador / Ysart Brothers (Vasart) items.
Some of the other canes in the Butterfly weight are known from pre-war Monart bottle stoppers (shape IE bottles) but are more often seen in Ysart Brothers (Vasart) items and hardly at all in Paul Ysart's weights.
As a point of interest, in the CPC Newlsetter no. 78, April 2002, there was a brief article on Salvador's "Floating Butterfly" weights. At that time CPC members knew of only ten in Britain and perhaps a few more in the USA. Seven were illustrated in the article. Since then I have seen some more (can't recall right now how many) but I suspect there are still less than thirty of these weights known to members of the PCC (formerly CPC).
And I think I have only seen two others with "plain" wings. And probbaly no others with a spoke pattern to the base! So why did I not win this latest example? Mainly because I forgot to put a bid in ... but I already have three Salvador Floating Butterflies so best not to be too greedy.