Pictured are 2 shaving brush containers that are typical components in the Gillette Traveler and Combination Sets, but the 2 larger containers are quite puzzling. I believe they might go with Rubberset Brushes. In the 3 images above, the large silver container matches the dimensions of the container for the Rubberset B-3 shown here Based on the similarities between the containers not made for the Gillette sets, I am prone to guess the brass/gold container is also related to Rubberset somehow. Beyond that, I am asking for insights and welcoming best guesses based on legitimate resources. Hopefully @BladeShark will also see this post.