Enter Luigi Romersa. October 12th, 1944 on the island of Ruegen, the Nazis set off what they called a 'disintegration bomb'. When the bomb detonated there was a flash of bright light. Trees were turned to dust and sheep were burned to cinders in a one mile radius.
Rainer Karlsch claims the Nazis set off three atomic devices during the fall of '44 and spring of '45 killing over 700 people. - Daily Mail October 1st 2005.
Curious enough all 3 devices used by the USA were of different types. As well as the Americans, the British were working on their own devise at this time. The Allies breakthrough did not occur until after a British column raced to the Baltic coast to 'rescue' German civilians fleeing from the advancing Communist armies. Perhaps the first test bomb was a German one. ???? It has often been claimed, though unproven, that the British were ahead of the Americans. Perhapse the 'German civilians' perfected the British bomb, the first to be dropped on Japan ???? before finishing the American one.????
In an ATL this could give Nazis 4 bombs before the end of the war and therefore months before the 'Western Powers'. Who would they drop them on?