They surely was Blocaded Leningrad made, all the trenches of the Wolchow front is still full of them. The last found by me was a year ago, near Sinimae hills, found attached to the guns, one was broken in the close combat and a piece of the bayo was still attached to the gun. When the soviets escape the successfull close combat, they take German trenches, and all unit was killed by mortars in the trenches.
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