The U. S. military was indeed concerned about maintaining a supply of precision miniature cameras when German miniatures became unavailable. The inventory of the U. S. branch of E. Leitz was seized by the government and the military went shopping for a U. S. manufacturer to assemble these. If the military talked to Kodak, they very likely found that the Ektra was being designed. Kodak had no part in the U. S. manufacture of direct Leica replacements, but a small company, Precision Instruments, headed by Peter Kardon, took up the mantle and produced the Kardon with an f /2 Ektar lens. Although I have never seen its formula, it looks physically very much like the f /1.9 Ektar for the Ektra.