According to an article in El Observador dated 23 May 2017, on 3 May 2017 a resolution authorized the Banco Central del Uruguay to introduce up to 10 million new 50-peso uruguayo polymer notes to commemorate the 50th anniversary of the bank. No word yet on when the notes will be introduced, but the Banco Central del Uruguay was created by law 13594 of 6 July 1967 and decree on 12 September 1967.Images of the new 50-peso notes appear in a video recently released by the bank.
Courtesy of Alex Zlotin and Cleo Phas.