I confess my hawkeye vision is not as sharp as it once was, yet who wants the world to know. So, I was happy to remember that many years ago I sold these really neat magnifiers. Made in England, this polished brass unit has a powerful 7.5 magnification glass lens which is only 1.3 inches in diameter. The whole length is less than 4 inches, so can be unseen in my shirt pocket, BUT, ready for that menu.
I have about dozen of these. All in their original tissue wrapping and velour pouch, priced at only $17.50