KM trade patches

[Rikster]

does anyone have or know of a pic online or otherwise with a definitive illustration of all KM trade patches, my friend in germany has his grandfathers stuff, but no trade patch...he remembers seeing it as a kid, but its vanished, he remembers what it looks like and thinks he would recognise it if he saw it........it apparently featured a "cogwheel" "zahnrad".........any help appreciated.
He was onboard a minesweeper...and has a fantastic model of it in a bottle made by his grandad whilst onboard...

[amiklic1]

Hi, if it has a cogwheel, it can be one of these.
Names under them are just informative, as KM ranks for sailors are pretty complex, especially for seamen which wore the trade insignia with or without chevrons etc. etc.

[Rikster]

Thank you