Solothurn fire-protection house holding VKF 12396 as a 2002 Fachfirma for the planning, installation and maintenance of sprinkler systems — one of the oldest live numbers in that Untergruppe. It also holds 45 VKF approvals for portable extinguishers, the largest extinguisher portfolio in Switzerland, and its sister company EuroSprinkler AG at the same Sagmattstrasse address holds a Untergruppe 621 Sprinklerkomponenten approval, one of only two held by a Swiss-addressed firm. Only the sprinkler recognition is keyed here; the directory has no subcategory for portable extinguishers.