Dirk Roosenburg designed the KLM logo at its establishment in 1919; he intertwined the letter K, L, and M, and gave them wings and a crown. The crown was depicted to denote KLM's royal status, which was granted at KLM's establishment.[71] The logo became known as the "vinklogo" in reference to the common chaffinch.[72] The KLM logo was largely redesigned in 1961 by F.H.K. Henrion. The crown, formed by a line, four blue circles and a cross, was retained. In 1991, the logo was further revised by Chris Ludlow of Henrion, Ludlow & Schmidt.[73] In addition to its main logo, KLM displays its alliance status in its branding, including "Worldwide Reliability" with Northwest Airlines (1993–2002) and the SkyTeam alliance (2004–present).[74]