Here are a couple of sources for Atala decals:
http://www.branfordbike.com/gifts/gift2.html#item5
Atala - Blue letters with black trim on a clear background.
Atala - Yellow letters with black trim on a clear background.
http://www.cyclesdeoro.com/Refinishing/Atala_Boka.htm
1970s era bike just had a all the way from bare metal restoration process