Can’t answer your question but I knew one of these. He was an unmarried engineer and when the depression came he was without work because the government decreed that if you were not head of a household, your job disappeared. He worked some in Egypt and Switzerland. The Swiss had just electrified a lot of their railroads and whenever the train went by it generated so much static that they couldn’t hear their radios. He said that the natives were on the edge of rebellion. Apparently he solved the problem and came to the states ending up doing good work for the Army Signal Corps. He was slated to inherit some property in Prussia and was invited to go back. He did not do it and said the property disappeared into Russia.