"Vintage" is a word that keeps inspiring many guitarists (and collectors of all kinds). Electro Harmonix, one of the very first manufacturers to unleash the creative possibilities of the stompbox format, has a series of pedals that can be filed under that category, and the 1970s Overdrive CMOS Hot Tubes is definitely one of those - see a video below of the original (and rather bulky) unit, now quite pricey and hard to find.... Click on the title for more