I would like a class that teaches how to achieve that measurement accuracy without laboratory equipment.
You're forgetting one, El Clarito, by Santiago 'Pichin' Policastro.
A 90-year-old Argentine martini
9 parts gin
1 part French vermouth
a twist of lemon
Men, if you don't want problems, correct the description, where it is most popular is in the Province of Cordoba ;)