Hints: 

• NEGC millefiori canes
• Although it is difficult, you can count latticinio strands.  American latticinio have 32 rods, while French latticinio have 36 rods.  There are no known example of a patterned Boston & Sandwich patterned millefiori weight. 

• Kulles "Identifying Antique Paperweights - Millefiori"
• Hawley "The Art of the Paperweight  - The Boston & Sandwich and New England Glass Companies"

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