question German Pins ?

[johnschou]

Hi Experts

In my album (WW2 militaria collectors-War relics forum. Uniforms, Guns, helmets, battlefield archeology - johnschou's Album: German WWW II Medals, Pins etc) I some questions to my pins:

Do anyone Know the pin beside the Brandenburg Pin, with the markers mark: Heimburger (could it be danish) ?
Do anyone know the pin with the letters: LKDE ?
On the back on my Stahlhelm pins it has markers mark M.M, do anyone know that marker ?
Do anyone know more about my police Pin ?

Thanks so far
Regards
John