Not a picture, sorry, but this description was taken from a website selling them -might be useful?
German hackamores are one of two popular types of bitless bridles. Hackamores are useful for horses with mouth problems, or those that just dislike any type of bit. The German version of the hackamore has a long shank, with a rubber covered chain noseband, and adjustable chain behind the nose. One pair of reins are used on the bottom of the shank, which gives nose pressure. It is very important to fit hackamores in the correct position to avoid nerve damage or restriction to the horses breathing. The hackamore replaces the noseband and is fitted slightly lower than a cavesson, but making sure the noseband is sitting on a solid part of the horses nose, not onto the soft cartilage below
I believe German Hackamores are more severe than the English version, so would just say be careful or at least get some expert advice from someone who has used one when you first try it out.