This is the pExtra Plus scandinavian/swedish internal & external cylinder. 

pExtra Plus offers a high level of security with a fully restricted profile, patented until 2032. Cylinders can be masterkeyed or keyed alike with euros, ovals, rims, screw-in, scandinavian cylinders from the pExtra Plus range. They are also compatible with pExtra Guard TS007 3* to achieve the ultimate level of security.

Every cylinder sold becomes registered to that customer and a key on that reference will not be sold without the consent of that same customer. Key blanks are not available for purchase, only cut keys.