Engravers Bold. It's hard to tell which one because of the method of reproduction.
It's available through a number of foundries, here are a few:

http://new.myfonts.com/fonts/itfmecanorma/engravers-size-one/bold/
http://new.myfonts.com/fonts/efscangraphic/engravers-sb/medium/
http://new.myfonts.com/fonts/urw/engravers/d-bold/