Signal balloons. Engraving from 1880 of hot air balloons with Morse code displayed on thier envelope | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Bildagentur-online / Tschanz |
Taille de l’image : | 3386 px × 5205 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |