SJK 171 (Graffiti Artist) (aka Steve the Greek) is one of the earliest New York City graffiti artists of the late 1960s and 1970s. He began writing in 1968 under the name SJK 171 with Mike 171, who grew up on the same street in Washington Heights. Around the same time, SJK 171 and Mike 171 met JEC * at school and became "JMS 171".
SJK 171 is generally credited with originating the "squiggly lines", a style of outlining graffiti, that 10 years later was used by Keith Haring. SJK171 is also credited with starting the use of arrows in graffiti writing around this time. He is also known as "King of the A Trains", because his graffiti dominated the A subway line of the New York City Transit Authority. His work first used a triple outline with large colorful letters which appeared on the 1 line. (Source: History of American Graffiti, 2011, Art in the Streets)
Fellow graffiti artists: Frank 207, MIKE 171, and JEC * were the first to hit trains with pieces with SJK 171 at the 168th St A train lay-up and 207th St MTA Ghostyard - which they founded. (Source: Beyond the Streets)
Later, he was one of the founding members of the United Graffiti Artists, a professional graffiti collective which began to attract media attention. He was featured in an important essay on graffiti art by Richard Goldstein which appeared in New York Magazine and inspired a new generation of graffiti artists.