Source: http://www.megalextoria.com/wordpress/index.php/2017/01/19/sega-master-system-poster/
The Sega Master System was a competitor to the Nintendo Entertainment System and a predecessor to the Sega Genesis. Although technically superior, it never did as well as Nintendo in most of the world (Brazil excepted). I was surprised to learn that in sold less than the Atari 7800 in North America. This was for a number of reasons including but not limited to: a slightly later entry into market, poorer marketing, and Nintendo's draconian and anti-competitive licensing scheme.
Above is a poster from 1987 that was included in many of the games. It features classic Sega artwork depicting characters and other various Sega gaming scenes.