Beautiful Locos Gents,
If you don't have the book A Lifetime With O Gauge by Jack Ray it is worth having. He had a large outdoor clockwork layout. on pp. 27-28 of the book there is some info on Walker-Riemsdijk. Also some interesting info of something He calls the "Teleguv". This is a governor based on that of a dial telephone. These allow the telephone dial to slowly turn back. You may want to look into making something like this to addapt to your clockwork projects. He says the Riemsdijk locos had great slow speed control that you manipulated by a wheel that protruded throught the cab roof. Interesting topic.
