German Aircraft Warning Plate 'Achtung! Blockiergefahr!'

Original aluminium German aircraft warning plate, measuring approximately 11 x 5 cm.The plate is clearly marked:'Achtung! Vor Einbau des Rades unbedingt Rostschutzfarbe der Bremstrommel mit Spiritus abwaschen. Blockiergefahr!'(Attention! Before installing the wheel, the anti-rust paint must be washed off the brake drum with alcohol. Danger of seizure!)A technical instruction plate intended for use on a German aircraft, related to wheel and brake assembly. Executed in aluminium with red painted background and white lettering.Shows honest age-related wear, light surface scratches, and minor paint loss consistent with period use. A nice and displayable original Luftwaffe aircraft-related item.