Thank you Arnold and Nick.
I now have five different "Swing Accessories" made by:
1. Doll;
2. Trevs Tool Box (I believe he only made one of these);
3. Empire Replica from SPS Steam Works (aka Saint Paul Steam);
4. Hawekotte & Klausmann (H&K); and
5. the KM&Co (Wilhelm Krauss) in the original post in this thread.
You can see the Doll and Trevs Tool Box versions in this video (together with my two Empire Ferris Wheels):
H&K Swings in this video:
And the Empire Replica in this video (with the Trevs Tool Box version):
I do like carnival ride accessories; and, I acquired a very nice Doll Ferris Wheel model from the Morton Hirschberg Collection: