Avery Brewing Co.’s most popular series has reached another milestone.

The 30th release in the Avery Barrel-Aged Series beer is Vallum, a 9.6 percent ABV ale brewed with Belgian malted barley, hops, wild yeast, lactobacillus and pediococcus and Cabernet Franc grape must before being aged in Cabernet Sauvignon barrels.

“Yet another 100% spontaneous fermentation!” reads the beer label filed with the Alcohol and Tobacco Tax and Trade Bureau (TTB). “The wild yeast living on the grape skins once again did all the heavy lifting. Now do a 12oz curl into your favorite fancy drinking glass.”

According to the label, 12-ounce bottles of Vallum were filled on July 12. There will be only 92 cases of the beer produced: 72 cases released to the public with 20 more cases held back by the brewery. An email sent to the brewery for additional details was not immediately returned.