thank you to Karlis for the link to the article which i will hope to find among the back issues of the SBR publications...

dear Jamey i agree-
even though various online FB messages and images are from enthusiasts rather than scholars, its valuable to be prompted to look for more evidence about the beads and components' origins, more than only the similarities of taste and style. the lettering on the clasps "made in France" is one factor to start with... but the most fancy shaped glass lampwork beads may have been made in France using Venetian coloured glass canes ?
Are there other ways to distinguish german-made lampwork beads of the mid-20th C, or japanese?