Whoa, just how fine did they make those printing screens? To be able to get a full page of text of instructions is insane quality for a handmade stencil. And they managed to have closed loops in the design without having the inner bits get filled in with ink as well... To avoid that, you'd need to have leave support structures to break up the loops. But those structures would make fine detail in small-font letters practically impossible to read. Especially for loopy letters.
And then multi-color cards with fine detail?!!?
I think they cheated a bit... A hand made stencil with hand rolled ink is not an automatic high-dpi color printer