Zahnschutz gegen Gummiparagraphen
Remscheid, Germany: Edition VICE-Versand, 1968
11.7 × 8.6 × 1.9 cm.
A cardboard box (each titled uniquely, it would appear), containing stamped rubber with three rubber bands - two of which are designed to go around the wearer's ears and the third extends from their mouth.
Available for € 550. from Raphael Levy, here.