As local I confirm that this flag is used in every single official building in the province of Zamora, but it was never made official. The city of Zamora did. S

As local I confirm that this flag is used in every single official building in the province of Zamora, but it was never made official. The city of Zamora did. Some details (in Spanish): https://es.wikipedia.org/wiki/Se%C3%B1a_Bermeja https://es.wikipedia.org/wiki/Se%C3%B1a_Bermeja