Hallo,
here in Germany these small german incendiary bombs are quite rare. I never had one in my hands. The US and british counterparts naturally are found very, very often. The dud-rate was very high, above 10%. So, from every Million bombs dropped, 100000 duds are left lying around. In my hometown its mostly US models TH 50 and 52. The X-model, with the explosive head is also quite rare. The wooded hillsides around town still hide many, because there was no construction there since the end of war. Since decades there are reports of discoveries in the local press. When a citicen reports a find, the area is roped off by local authorities and the EOD is called. They have to drive an hour to reach this place and mostly get angry about being called for such an "inert" piece of metal junk. They throw it in the back of their car and depart again. So, the cost of collecting this "inert metal" is extremely high ( 1 full 8 hour EOD manpower shift plus 4 hours automobile) I do not know how this metal-debris ( casing : Electron= alloy of Mg and Al that even today is used in aircraft construction plus Thermite = Al + Fe2O3= Aluminum and black Ironoxide, which is very, very difficult to ignite; Goldschmidt Reaction) is classified officially. I forgot the Sulphur containing , pressed in , igniter, that degenerates in the wet ground to an unreactive mass. There are still so many of these lying around in Germany, that for decades to come they will be found. How are these old, inert bombs classified internationally ?
Regards,
Bellifortis.