 The network taken over by Oslo Sporveier was extensive, consisting of the Vippetangen-, Vestbanen-, Homansbyen-, Sagene-, Grünerløkka–Torshov-, Rodeløkka-, Kampen-, Vålerenga- and Gamleby Line taken over from KSS and the Skøyen-, Frogner- and Briskeby Line taken over from KES.There was sufficient rolling stock from the two companies that Oslo Sporveier had a surplus; they had 148 cars, numbered 1–22 and 33–157, and 186 trailers, numbered 401–540 and 601–646—all the stock was double axled.After the take-over Oslo Sporveier immediately started expanding the network; on 1 August 1925 the Homansbyen Line was extended from Adamstuen to Ullevål Hageby (becoming the Ullevål Hageby Line).