The Southern Railway of the USA was unusual (unique?) in using 'railway' rather than 'railroad' in its title. Looking at Wiki the armband does seem to be very similar in colour and type face to the U.S. one.
Not unusual at all in the USA. Over the years it was a periodic event that a company constituted as a Railroad would go bankrupt, and needing to come back under a different legal name would do so with the same general name but ending Railway instead of Railroad. There were some in this circumstance went the other way as well. Of the five regional lines which in the 1890s consolidated to form the Southern, I believe three were Railroads and two were Railways.
The current successor, the mainstream Norfolk Southern, is a Railway rather than a Railroad, although above it in its business structure is the Norfolk Southern Corporation. It's other principal constituent, the Norfolk & Western, was a Railway as well.
The term Water Boy was considerably used in the USA for the labourer who took refreshment, just water, out to those working in the open, whether on farms or the railway. Inevitably, especially where the Southern ran, most were African Americans. As the term Boy for these men, of all ages and quite often elderly, became unacceptable, the change has been made.