It was listed by Exhibit Antiques. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Exhibit Antiques has dated this piece to the 1860s.
Spiral ‘mezza filigrana’ glass plate from the Venetian glass manufacturer Salviati & C. Produced under the ownership of Dr Antonio Salviati.
Finished with a shallow recess. Rough pontil and slag seed material consistent with its age.

Date & Origin
Island of Murano, Italy, c1859-72.
Condition
Excellent, no chips cracks or restoration.
Dimensions
Height: 1.7cm Diameter: 7.5cm.
Comments
An exquisite example, similar plates can be found in the Glass Museum in Murano, Venice. View those examples here: https://bit.ly/3x7t9h0

Traditionally, this technique is known as “latticino,” named for the combination of milk (lattimo) glass threads fused in crystal (cristallo). This specific technique is more modernly termed “mezza filigrana” (half filigree).
Exhibit Antiques has dated this piece to the 1860s.
Specialists in 18th & 19th century antique glass
You can view the stock and full dealer information on the Exhibit Antiques Profile Page