What was the evocative name given to the dark-chocolate version of the Milky Way bar starting in 1936?

Answer

Forever Yours bar.

An early variant of the Milky Way, which featured a dark-chocolate coating over a filling of vanilla nougat and caramel, underwent a significant rebranding event in 1936. At that time, the company decided to give this dark chocolate iteration its own distinct brand name: the Forever Yours bar. This name was used for several decades, spanning over forty years, to highlight the contrast between the dark chocolate exterior and the 'snowy-white nougat' within. Sales eventually declined, leading to its removal from shelves in 1979, though the recipe proved popular enough to be reintroduced later under different names, eventually becoming the Milky Way Midnight bar in 2000.

What was the evocative name given to the dark-chocolate version of the Milky Way bar starting in 1936?
nameHistorygalaxyastronomyMilky Way