

Charter Oak Winery is a gem of Napa Valley. Like many other wineries in the valley it began as a small family operation. While it’s grown since its founding in the early 20th century by Italian immigrant Guido Ragghianti, Charter Oak is still family run, by Guido’s grandson Robert Fanucci, who continues to use much of Guido’s original equipment and techniques today.
As the #1 back-vintage retailer in the US, Benchmark Wine Group prides itself on being a trusted source for the greatest wines in the world. Their unparalleled market knowledge and exceptional service have come together to provide the most accessible cellar of rare and sought-after wines with a guarantee.
Provenance Guarantee
Phone: 707.255.3500
Fax: 707.255.3503
SMS: 707.200.4049
Monday-Friday 8:30am-4:30pm
Shipping Questions?
[email protected]

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