Yes, yes, it's a spirituous cocktail without fruit juices that best shows its crystalline beauty when stirred rather than shaken. However, it's the one...
The Seattle Times just wrote about the Vesper at The Doctor's Office in Seattle, WA, including a batch recipe. Their preference is Beefeater, Reyka vodka and Cocchi Americano, as well as a good slug of water and freezing it (instead of dilution via shaking).
https://www.seattletimes.com/pacific-nw-magazine/the-perfect-vesper-has-been-found-and-it-can-be-stored-in-your-freezer/