Kronos was founded in 1930 by Carlos Vendrell in Barcelona. It is a house brand of Unión Suiza, which is also owned by the Vendrell family.
Marc Gené
Likely around 1999 to 2000, at least two Marc Gené edition K100 chronographs were released by Kronos. Further details are not well documented at this time.
Montjuïc
As early as 2003, the Montjuïc collection was featured on the Kronos website. Created to pay homage to the Montjuïc street circuit that had previously hosted both Grand Prix motorcycle racing and Formula 1, a total of 600 numbered pieces were produced. The even numbered pieces featured a black stainless steel case while odd numbers were made of satin-finished steel.
Whether or not official licensing was involved is not currently clear.
References
https://masqnuevo.net/es/Relojes-de-segunda-mano/9000-reloj-kronos-k100-chronograph-marc-gene-de-segunda-mano-8000000100389.html
https://masqnuevo.net/es/Relojes-de-segunda-mano/9008-reloj-kronos-depose-k100-chronograph-marc-gene-38mm-acero-inoxidable-de-segunda-mano-8000000100388.html
https://web.archive.org/web/20031219221545/http://www.kronos.es/Flash/Flash6.htm