BMW R75 "Panzer" by Maria Motorcycles
"Apparently, this Maria Motorcycles' project started because the owner of thisBMW R75/6 was looking for a new seat. He already had the engine and few other parts rebuilt, but when he met the guys at Maria's, he decided to change his bike completely, starting a more ambitious project: the Panzer!"Via: http://inazumacafe.blogspot.com.es