Monaco have long history of F1 Grand Prix races, with first race organized in 1929. Monaco F1 street circuit is today most prestigious race in F1 calendar. So it's not surprise to see many Formula 1 related stamps in Monaco. Last few years they regularly issue stamps related to this sport, and i recently received few F1 sets from Monaco:
Formula 1 Legends - Jim Clark and his Lotus 33 (1965)
Formula 1 Legends - James Hunt and his MacLaren M23 (1976), issued on 8.3.2017. Legendary Race Cars - Matra MS80 (1969) and Ferrari 156 (1961), issued on 8.3.2017.