foursome

Between 1950 and 1967, CBS television ran a popular game show in which four panelists asked question in order to guess the occupation of a guest. The name of the game was "What's My Line?". Now you get to play the game except that you have to use observational skills rather than ask questions. What do you think is the occupation of the four men seen in this cabinet card photograph. Three of the men are in uniform and wearing hats displaying identification numbers. At least one of the three is wearing striped pants. The fourth man is well dressed and wearing civilian clothing and a light colored hat. He is also chomping on a cigar. My guess is that the men work for a railroad. It is also possible that they are firemen. Any comments conjecturing about their line of work, would be appreciated. The name of the photographer and the location of his/her studio is unknown.