To download click on the picture to get a full size image. Right click and "save to" your computer desktop or a folder of your choice.
I picked this image and the one below it because I realized that they are the same dirigible from 2 different artist renderings.
I snagged all of these wonderful images from the Library of Congress site. If you want to see some more cool stuff just click here to visit the site. Be warned.... you'll probably spend hours there downloading stuff.