Easily my favourite drink of all time. Just perfectly balanced perfection. I'm curious what people's experiences are of how it's prepared & served 'in the wild' - the traditional method of building it in a glass & stirring seems to have fallen out of favour for quite a while now. Almost every bar I've ever been in will use a mixing glass, and serving over block ice now seems the norm (my preference too).
For those curious - I believe this originates from the 1934 edition of 'The World's Drinks and How to Mix Them' by Bill Boothby. It's not in the 1908 edition, but may feature in the 1930 revision (which I don't have access to).