Final answer:
The most widely 'copied' version of the sector refers to the American sector in Berlin, established in 1945, not an object but a zone resulting from the Potsdam Agreement after World War II.
Step-by-step explanation:
The most widely copied version of the sector is typically associated with the division of Berlin after World War II. The photograph is taken in 1945 by Walter Elkins depicts the American Sector in Berlin. However, the 'sector' in a historical context does not refer to a specific object that was copied but to the zones of occupation in Berlin which were divided among the allied forces post-World War II. the creation of the sectors was not the work of a single individual but the result of agreements between the allied forces.
The American Sector was one of these zones, established as part of the Potsdam Agreement.