Austria-Hungary, Empire. A Pola U-Boat Pen Cap Tally Ribbon

(Mützenband “K.u.K. Unterseebootstation). Constructed of black rayon, the exterior bearing a machine-embroidered gold bullion wire inscription of “K.u.K. UNTERSEEBOOTSTATION”, unmarked, measuring 3.5 cm (w) x 24 cm (l), a shortened version in very fine condition.