Insofar as Neuland and Koch specifically, his work on that particular hand was on metal plates. An angular Neuland especially at circular letters. D, C, O, P, R Not sure what instrument he was using. I believe that the lettering was developed on or about 1923. Neuland has Roman underpinning in its foundation. If you were to chizil away the broad strokes , surprisingly you will find skeletal letters based on Geometric forms which were Roman in design... He died at age 59 from a heart attack. As a matter of fact, its a hand i also enjoy. Here is a flyer for an up and coming workshop on this hand.