Question: When was this championship competition held that the oldest Star club of Argentina still competing in official tournaments participated in ?

text: Star (football badge)
List -- Club teams

In football, some national and club teams include one or more stars as part of (or beside) the team badge (often referred to as a crest) appearing on their shirt, to represent important trophies the team has previously won. Often this is a unilateral decision by a team itself, rather than a specific privilege earned or sanctioned by any governing body (e.g. as with the FIFA Champions Badge), and as such, the relevance of these stars on a club's shirt is somewhat tenuous.
Club Team Country Title ( s ) represented Number of stars Notes
Vélez Sársfield Argentina Argentine League , Copa Libertadores , and Intercontinental Cup 11 ( 1+10 ) Gold star for 1994 Intercontinental Cup over 10 blue stars for 6 Argentine and 4 international titles
Estudiantes de La Plata Argentina Argentine League , Copa Libertadores , and Intercontinental Cup 11 5 Argentine league titles ; 4 Copa Libertadores ; 1968 Intercontinental and 1969 Interamerican Cups . An earlier badge had just four stars , for the Libertadores and Intercontinental titles . Tenth star added after Copa Libertadores 2009 victory
Rosario Central Argentina Argentine league and CONMEBOL Cup 6 ( 4+1+1 ) The middle star , for the CONMEBOL Cup , is larger . The previous badge had 5 blue stars and one larger yellow star ; the extra small star was for the unofficial 1974 Argentinian Championship , a qualification playoff for the 1974 Copa Libertadores
Newell 's Old Boys Argentina Argentine league 7 One star per title , including one each for the 1990 Apertura and the 1990/91 Apertura/Clausura playoff
Argentinos Juniors Argentina Argentine League , Copa Libertadores , and Interamerican Cup 5 3 Argentine League ; 1985 Libertadores and 1986 Interamerican Cup
Club Atlético Lanús Argentina Argentine League , National Cup and two international titles 5 2 Argentine League ( 2007 and 2016 ) ; 2016 Copa Bicentenario , 2013 Copa Sudamericana and 1996 Copa CONMEBOL
Boca Juniors Argentina Various Titles 68 The club has a policy of adding a star to their badge since 1970 for each title worn ever ( Except during 2007-2009 when a design with only 3 stars was used for each Intercontinental Cup won ) . However , the version of the club badge on the shirts provided by kit manufacturer Nike remains on 52 stars as of 2019
Quilmes AC Argentina Argentine league 2 Amateur title of 1912 and 1978 Metropolitano
Ferro Carril Oeste Argentina Argentine league 2 1982 Nacional and 1984 Nacional
Club Atlético Banfield Argentina Argentine league and Copa de Honor 2 2009 Torneo Apertura and 1920 amateur Copa de Honor
Racing Club de Avellaneda Argentina Intercontinental Cup 1 Trophy won in 1967 ; star added for the fortieth anniversary
Chacarita Juniors Argentina Argentine league 1 1969 Metropolitano
Joinville Brazil Campeonato Catarinense 12 12 titles won
Americano Brazil Campeonato da Cidade de Campos 9 For 9-in-a-row 1967-1975
Vasco da Gama Brazil Various Brazilian and South American 8 South American Club Championship 1948 ; Copa Libertadores 1998 ; Copa Mercosur 2000 ; 1974 , 1989 , 1997 and 2000 Brazilian Championships ; unbeaten Campeão de Terra e Mar season in 1945
Palmeiras Brazil Campeonato Paulista , Brazilian Championship , Copa Rio 9 ( 1+8 ) 8 titles won under the name Palestra Itália between 1920 and 1940 . Others say it commemorates the eighth month ( August ) of 1914 , when the club was founded . Previously wore 4 silver stars , one for each Brazilian championship conquered ( 1972 , 1973 , 1993 , 1994 ) . Stars are placed inside the badge , rather than the usual placement above . A red star above the badge was added in 2017 for their 1951 Copa Rio win
Santa Cruz Brazil Pernambucan Championship 8 ( 3+5 ) Club badge has 5 yellow stars for the 5-in-a-row ( 1969-73 ) and 3 stars for 3 super-championships ( black for 1957 , white for 1976 , red for 1983 )
São Raimundo ( AM ) Brazil Copa Norte , Campeonato Amazonense 7 ( 3 + 4 ) 3 red stars for Norte 3-in-a-row 1999-2001 ; 4 silver stars for Amazonas titles
Internacional ( Porto Alegre ) Brazil FIFA Club World Cup , Copa Libertadores , Brazilian Championship , Copa do Brasil 6 ( 1+5 ) Silver star for 2006 World title , 5 gold stars for others , with the Libertadores star larger than the other 4 ( 3 Championships , 1 Copa )
Goiás EC Brazil Brazilian Série B and Goiás State Championship 2 2 silver stars , for the 1999 and 2012 Série B championships