5 pesos Tesorería General del Estado de Yucatán

Yucatán's wartime financial isolation made outside printing the only practical option. The peninsula's remoteness during the Mexican Revolution — compounded by Carrancista political tensions and an export economy running almost entirely on henequen — left state authorities unable to rely on Mexico City for monetary supply. Parsons Trading Co. was a commercial firm, not a specialist security printer, which shows in the relative simplicity of the execution.

The stamp constitutes the primary authentication device — a meaningful vulnerability given how aggressively revolutionary-era Mexican state issues were counterfeited.