Halifax and South Western Railway
The Halifax and South Western Railway (reporting mark H&SW) was a historic Canadian railway operating in the province of Nova Scotia. The legal name of this railway was the Halifax & South Western Railway, as is defined in various Acts of the Nova Scotia Legislature, such as 1902 c.1, Act respecting the Halifax & South Western Railway Co..
Source: Wikipedia — Halifax and South Western Railway (CC BY-SA 4.0)