The only thing known to me is the fact that there is at least one picture of a Do-24MS, so it did exist. The MS extensions stands for Minensuche (mine search), and the plane was equipped with a large ring around the fuselage. This ring was attached to powerful batteries and when turned on gave the magnetic mines the idea that there was a ship passing by above it and so the mine would explode. All this of course happened without causing any damage to the Do-24MS. Although aircraft fitted with a magnetic ring usually got the designator MS, there is no evidence that this was the case with the Do-24, the sole(?) Do-24 with this magnetic ring was most likely still designated as Do-24T. The only known picture shows a Do-24 from Seenotstaffel 5, which was based at Stavanger in Norway and the picture was probably taken just after the war ended.