@Gordon
I think it's a pity that the U-Boatbadges- and Clasps were not presented in detail.
That would have done the book really well, because the "Torpedo Los!" was purchased mainly by Uniform-Collectors, and its was sold out by Roger. This is disapointing for many badge collectors
What would have talked about it?
About "LM", we have no definitive evidence for this producer, therefore we can only guess about it.
So I thought because you say definitely LM you have the sound proof.
If so, why did not it printed in the book?
Otherwise, a good work!