Caboose Antennas

Model Railroader Prototype information for the modeler
1

Can someone tell me what type of antenna was used by B&M during the steam and diesel era. 1945-1955?

2

Did they actually have a radio with an external antenna? If you put Boston and Maine Caboose into Google, you’ll come up with a bunch of hits. Examples are: http://faracresfarm.com/jbvb/rr/bmrr/cabooses.html and

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