A Rare Spanish Civil War "British Subject" Armband for an Embassy Employee

Spain: Fabricated from white cotton, screen-printed in red and blue inks, illustrating the flag of the United Kingdom with the inscription "SÚBDITO BRITÁNICO" (British Subject) below, with official stampings in black ink on either side, reinforced stitching along all four edges, the two ends held in place via two safety pins on the reverse, 83 mm x 155 mm, lightly soiled, near extremely fine.