Inspired by the topic "What's your oldest camera?" in the Film Photography Talk section by @Maoby and because of the fact that I don't really own any (interesting) old cameras myself, I wanted to ask everyone:
What are your oldest lenses?
Because not all lenses are easily dated (and perhaps also because your third oldest lens may be the most interesting,) I kept lens in plural form intentionally, so you can choose. And if you have any pictures of the lens or taken with the lens - no matter if on film or adapted to digital - please share them here as well!