I don’t have the exact specs on hand, but those tiny typewriter gears run pretty tight—tolerances around a few thousandths of a millimeter, so they’re in the same ballpark as the precision you’d see in old watch springs. Not as exact as silicon micro‑electronics, but the mechanical craft that made them work reliably for decades is still pretty impressive. I actually logged a few of those in my spreadsheet of quirky engineering, and they’re the kind of detail that makes a typewriter feel like a pocket‑sized marvel.