Stockholm–Roslagens Järnvägar
Stockholm–Roslagens Järnvägar (SRJ) was a private railway company in Sweden 1885–1951, running a vast network of narrow gauge railways in Roslagen north of Stockholm. The company was taken over by Swedish State Railways in 1951, formally combined into Swedish State Railways in 1959.
Source: Wikipedia — Stockholm–Roslagens Järnvägar (CC BY-SA 4.0)