Kreisler Craft Change-O-Color: Vintage 1949 Men's Fashion Accessories Advertisement
This guy is having the best day ever. He just got the new Kreisler Craft Change-O-Color cuff links and "with the flick of his finger, it changes color to match his suit." Now he'll look super dapper on his dinner date, no matter what color suit he chooses to wear!
Amusing Kreisler Craft advertisement from 1949.
Image source here.