Now that is interesting - I was wondering about the Davis rotary . . .
Another interesting note the Pritzlaff name on the chart (for VS) is listed as taking the same needle and shuttle as the early Eldredge machines.
I'd bet money this machine was made by Eldredge/National. Now I'll have to look more into the Davis Rotarys and see if they were only reselling someone else's machines. We need our resident Davis expert to chime in!