Flag of the FNAT, a state leisure service during Portugal's Estado Novo. Layout and coloring is based on the flag reproduced on the cover of José Carlos Valente's Estado Novo e Alegria no Trabalho, 1999 ed., although several other coloring schemes exist; similarly, the emblem is based on the standardization in Mário de Albuquerque, Franz Paul de Almeida Langhans,  Brasonário Corporativo na Exposição de Heráldica do Trabalho. Heráldica Corporativa Legislação, 1955 ed. (note: tinctures described for the emblem are significantly different than colors used on flags).
Own work
Dahn