Brockman was simply a graphic design genius way ahead of his time. I have posted two examples of concert posters that were both done in 1955 by brockman for the Zurich Tonhalle. I really like the Beethoven one because of the unique way the lines mimic an old concert hall. The Strawinsky one is also great beacuse of how modern it is. It looks like a poster you would see around somewhere today. Around the time that he did the concert hall posters he also made a series of posters for the Swiss Automobile Club supporting their "Watch that child!" campaign. The example here is great because of the size relationship between the motorcycle and the child being so exaggerated.