Editor's note: Remember when your first-grade teacher taught you to tell time with a brightly-colored cloth clock, how it was easy to understand the little hand but the big hand was another story? And now, in this age of check-the-time-on-my-phone, there’s something nostalgically gorgeous about a big, round, Roman-numeral-emblazoned clock. Bring it all back with this lovely, retro collection, and treat your modern screens to some classic Clock wallpapers.