The 197374 season saw the arrival of Johan Cruyff, who was bought for a world record 920,000 from Ajax. Already an established player with Ajax, Cruyff quickly won over the Barcelona fans when he told the European press that he chose Barcelona over Real Madrid because he could not play for a club associated with Francisco Franco. He further endeared himself when he named his son Jordi, after the local Catalan Saint George. Next to champions like Juan Manuel Asensi, Carles Rexach and Hugo Sotil, he helped the club win the 197374 season for the first time since 1960, defeating Real Madrid 50 at the Bernabeu along the way. He was crowned European Footballer of the Year in 1973 during his first season with Barcelona (his second Ballon d'Or win; he won his first while playing for Ajax in 1971). Cruyff received this prestigious award a third time (the first player to do so) in 1974, while he was still with Barcelona.

Answer this question, if possible (if impossible, reply "unanswerable"): When did Cruyff win his third Ballon d'Or?
1974