Gorgeous, the connection is pretty clear, yeah! Makes me wonder if the handwritten signs from the last century couldn't be considered one of those kind of undocumented, almost subconscious arts "traditions". Kind of like how all kebab places seem to follow the exact same horrible aesthetic without it being a coordinated effort.
Oh there is plenty of documentation on these sorts of things, in the form of tradecraft manuals. The first example that comes to mind is the Speedball lettering manuals (https://www.printmag.com/design-inspiration/the-speedball-te...) but there’s other ones out there that have gone through many printings.
