I recently came across some Ideal hose clamps with packaging that said “Made in USA, Fabrique aux E.U., and Hecho en EE. UU.” The person who had showed me the item had made the common mistake of thinking that E.U. stood for European Union.
Fabrique aux E.U. is an abbreviated way of saying Fabrique aux Etats-Unis, which is French for Made in USA.
Similarly, Hecho en EE. UU. is short for Hecho en Estados Unidos, or Hecho en Estados Unidos de America, which is Spanish for Made in USA. In Spanish, plural phrases are often represented by double abbreviations, meaning that Estados Unidos (United States) is abbreviated as EE. UU. instead of just E.U.