The back of each Corollary bottle has a URL so you can learn more about the wine. The first four digits of the code at the end of the URL tell you the year and month when the bottle you’re holding was disgorged. So in the example below, the wine was disgorged in December 2019 (19-12).

 
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210104 - 750mL. Disgorged 60 cases in January 2021 with a dosage of 5g/L. 32 months on the lees.

210801 - 750mL. Disgorged 6.5 cases in August 2021 with a dosage of 5g/L. 40 months on the lees.