That's a drop-dead gorgeous #80, Scott.
I know it's only the internet, but a lot of these brass or bronze spoke shave tools are identified as coach makers, as opposed to carriage makers tools. Think of the coach work done for early autos and passenger cars on trains. These seem to have replaced the wood bodied carriage maker stuff around the turn of the last century. The one rabbet shave, for example, has a Stanley Sweet Heart blade, making it an obviously 20th Century product.
But your pattern maker idea does make sense.
30 years ago, people were wondering about the brass "Stanley" tools that turned up. Theories included Stanley workers making tools for themselves using the company molds. I think you've just shown us how they came about.