From the Wikipedia article, https://en.wikipedia.org/wiki/Captain_Nemo#Emblem. I edited this to make it easier to identify (straightening out the image), but two other versions exist: https://commons.wikimedia.org/wiki/File:20000_mobilis_in_mobili.jpg. Of these, the older has better quality, looking to be a photograph from a book: https://upload.wikimedia.org/wikipedia/commons/archive/c/cf/20080821201516!20000_mobilis_in_mobili.jpg. The font looks a bit like Courier New, but with bigger spaces, or like something from an old typewriter? The extended right leg serif on the N is particularly unique, as are the squished Bs, the bottom serifs on the Ls, and the sloped M verticals.
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