Absolutely spot-on identical to the description given by my father of his 1930's Dürkopp, handed down to him from his father. Don't know if he had it prior to the war, or whether he bought it after the war. Doubt if it was when he was underground.

Torpedo hub, single spoon-type rod brake, and the triangular leather tool bag - all a spot-on description of what he described to me.
-Kurt