The Unknown Deck

This is a deck of cards I bought some years ago. It's been lying around the appartment for years. Initially, I bought these cards because they were so different - unlike any cards I had seen before. Eventually, I put the deck away and forgot all about it. Recently, I re-discovered it and I started studying them. However, I have no idea how to play the game with this deck! All I know is the name of the game in Slovene: "briškula" (brishkula). On the box there are 2 more names: "triestine" and "triplex". The game is very popular in Italy and Istria. Perhaps it's played somewhere else, too? :-)

Well, I would love to learn to play it, so if any of you out there know the rules, you're welcome to comment this post and explain the game! I will be very grateful! :-)

The photo is also posted on my Flickr page.