couldn't possibly have originated elsewhere
Agreed with Ivo. Is it in any possible that it could be made elsewhere? Well, yes. For example, I've seen reticello ( a typically Murano technique) made recently in the USA that is as fine as any of the reticello I have from Murano. However, the US reticello piece was signed and cost over $2,000 and none of my pieces cost over $100.
It's much easier to copy some of the other Murano techniques, such as sommerso.
There's also scale, which Ivo might be covering by using "slightness." This is not a big piece, which more modern copies tend to be.
M: Do you have a link to a Clichy piece that is similar to this piece? It might be interesting to compare the pieces if you do, and Craig doesn't mind a little detour for his thread.
David
PS After posting this, I read another thread "Latticino from St Louis or Murano" and I understand flying frees question more clearly now.