p22 Underground Thin Small Caps look to be the one.

greetings Jeffrey
infraordinaire

Nope it's not. The hunt is still on.

Very close to Agenda Thin from Font Bureau. The short middle arm of the E is the hardest part to match and Agenda's is a bit shorter, at least. The G chin is the only other noteworthy detail in these letters, and it is relatively low. Unfortunately this G shape is probably the most common, so it's all about the amount of closure and the proportions of the chin relative to the rest of the letter.

- Mike Yanega