The ‘Royal Hunt’ Brewery was built in an area of Brussels which had been used as a Royal hunting ground many years before. It closed in 1968.
I am not much good at dating these labels but the R.C.B. number which is used to identify breweries in Belgium was introduced in the early 1950s as far as I am aware. R.C.B. 3046 was used for La Chasse Royale. It was compulsory on all labels for use in Belgium, I am not sure about export labels. That would date the rectangular labels as 1950 and 60s.
Thanks to Eric, for the loan of these labels and I gather he is not averse to an offer for one or more of the set.