Vintage Boca 40's to 50s shorts

Not much I know about these kits, but from the add I'vs founded, these Boca Juniors shirts made by Sportslandia. 1940s period Boca won 3 more titles, the same as the last decade. The first was obtained in the 1940 league, the same year that Boca Juniors Stadium was inaugurated.  
Boca Juniors shirts was compliment with these style of shorts from the early 40s through 50s.