About Werner von Clemm
Lived 1897 – 1989 (aged 91). Werner von Clemm was an American and German banker and smuggler.
Werner Conrad Clemm von Hohenberg (September 27, 1897 – April 14, 1989) was an American banker born into a German family that married into the German nobility, the Nazi Party and prominent American families. His father-in-law was a Vice President of Citibank. In 1922, Werner immigrated to the United States. Prior to this, he had served in the Imperial German Army during World War I. He was a representative of the German international banking firm Hardy & Co. and an employee of the Pioneer Import Corp., which imported materials from Germany and handled his cousin and Nazi diplomat, Joachim von Ribbentrop's champagne business.
Along with his twin brother, Karl von Clemm, Werner had become friends with U.S. businessman, William Rhodes Davis. In the United States, Werner became Vice President of Davis' company, Davis & Co., which shipped large quantities of oil to Germany and became a propaganda strategist and financial aide of the America First Committee, which encouraged American isolationism. Werner lived on a 200-year-old Dutch colonial home on a 130-acre estate at Syosset, New York.
In 1940, the Nazis seized large quantities of diamonds from Belgium and the Netherlands, which Werner was smuggling to the United States. The U.S. was neutral and did not declare war until December 1941. To avoid detection, Werner moved the diamonds through various European cities, shipped them to South America and they eventually found their way to New York City. Buyers in New York would make payment to a Berlin bank called Imico-Handel, which then turned the money over to the German government. "The Cremer memorandum proceeds to explain the procedure to be followed. Belgian diamonds are to be shipped from Belgium to Imico in Berlin by courier. It will be the 'task of Imico to obtain the required statistical papers, export currency declarations and above all, the American consular papers which are necessary for the dispatch of the parcels.' After Imico has submitted a parcel for inspection by the 'duty officer of the Wehrmacht,' Imico will send it to 'the cloaking agent in Portugal' who will transmit it to New York. The buyer in New York will make payment to a New York bank for the account of RKG Berlin [the bank in which the Imico and Pioneer accounts were kept] in favor of Imico. The memorandum goes on to say: 'Imico reports the receipt of payment to the Commissioned Official [the German military government] who thereupon disposes of the amounts.'"Various German documents referred to the diamonds as "Jew" diamonds. After further investigation, Werner von Clemm was arrested on 28 January 1942. He and the Pioneer Import Corp. were charged with conspiracy to import under false declarations. Three others, including Carl von Clemm, were indicted in absentia.
During his trial, Werner testified that, "This German high command stuff is a lot of bunk," and he was running "a decent, legitimate, honest importing business." In the last four years, his business had brought in $2,200,000 worth of German goods, including $552,000 in diamonds. Werner claimed "I'm just a poor little importer trying to make a living." In August 1942, Werner and Pioneer Import Corp. were both found guilty. It took the jury only 90 minutes to reach their verdict.
Prior to sentencing, U.S. District Judge James Patrick Leamy berated Werner:
"These diamonds from Holland were stained with the blood of innocent people. When, some years ago, you took the oath of allegiance, some things were asked of you and some things were not asked of you. You were not asked to abandon your love for your native land, for that would be like asking a child to abandon its love for its mother. But you were asked — in fact, it was demanded of you — that you transfer your loyalty from Germany to America. From the evidence brought out in this trial, I am convinced that you have not." Your trial brought out the fact that you did not have any loyalty for your adopted land. Every dollar sent to Germany was used to commit murder, rape, and other wanton violence. You were not acting in the best interests of the United States or its people when you bought bloodstained diamonds. These were seized in acts of rape, slaughter, and plunder of innocent people. Every penny helped in further acts of slaughter." Werner received the statutory maximum sentence of two years in prison and a $10,000 fine. An additional $10,000 fine was imposed on the Pioneer Import Corporation. Upon his release, Werner entered private banking. His son, Michael von Clemm, went on to become a leading American banker who was involved in Western banking operations in Africa and helped found Canary Wharf.
After the war, Werner sought compensation for his liquidated stocks and seized gems. The federal government refused, on the grounds that he had acted as an "enemy agent". In the 1950s, 1960s, and 1970s, Werner repeatedly attempted to obtain compensation. However, all of his appeals were denied on the grounds that the evidence against him was overwhelming. Furthermore, there was evidence that he'd continued to maintain contacts with Germany after the United States entered the war.
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Important facts
People in Werner von Clemm's life
Named in this biography and alive at the same time
Contemporaries
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Frequently asked questions
Who was Werner von Clemm?
German businessman and smuggler (1897-1989)
When was Werner von Clemm born?
Werner von Clemm was born on 27 September 1897 in Mainz.
When did Werner von Clemm die?
Werner von Clemm died on 14 April 1989 in Biddeford.
What was Werner von Clemm's occupation?
Werner von Clemm was a banker and smuggler.
What nationality was Werner von Clemm?
Werner von Clemm was American and German.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Werner von Clemm. https://biography.guide/werner-von-clemm/
MLA: "Werner von Clemm." Biography.guide, https://biography.guide/werner-von-clemm/.
Chicago: "Werner von Clemm." Biography.guide. https://biography.guide/werner-von-clemm/.
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