Pepe´s Bar was a Spanish bar, and researching it is quite challenging because nothing is more typical of Spain than a bar named Pepe. I'm not sure if it might be one located in Benidorm, but according to an interview with its owner on Cadena Ser, I found out it opened in the 70s-80s and its main clientele were basically Belgian tourists. Perhaps this connects with the advertisement for Haig&Dimple Scotch whisky that appears on the back of the box.

Anyway, I will continue investigating to see if I can find any good information starting from the advertisement for those whisky brands. I'll be back with updates.