1945 50 Cents Lots O Die Clash

A narrow date 1945 50c coin with clearly defined Clash Marks..... 1945 is a year that you can find a lot of coins exhibiting them, quite often you will see doubly clashed or triply clashed Reverses and very strongly clashed Obverse. The mint workers just seemed to let clashes go, but you can find coins for previous years where you can see that there was a definite attempt to file out the clash marks on the Reverses and put the dies back into production.

Can't speak to the mark that you are asking about, but 1941 to 1945 were among the WW2 years and you can find many unintentional aberrations as many skilled Mint workers were siphoned off to support the war efforts.