The first clue is the makers mark.
L/21 is not the LDO number for Godet.
L/21 is the number for Forster & Barth, Godet's LDO number is L/50 and their PKZ number is '21'. The fakers only did half a job on their homework.
Looking for LDO marked EK2s and items relating to U-406.....
whahaha...thats a big joke !!
but im glad you tell me the clue !
thz al lot for youre comment