Most probably a custom designed logo, but I'm quite confident we can find something similar.

O-Berta is too round.

That's the closest match I can find off hand it seems. T-26's September Bold has some characteristics to it as well--probably the closest match on my machine anyhow.

I wonder if Treacyfaces.com doesn't have something similar.

Couldn't find anything. Sorry.

They had to pay $15.6 million to the model on the label since they didn't pay him for the use [read article]. I hope it isn't the same thing with the font. ;-)

Ha!

Nestlé... phah!