there are also notes of the mystery 3 & 4 notes with an already printed BTC value, like 0.01, 0.05, etc?
and where can i pre-order them?!
Mystery notes are experimental and come in normal values. Unloaded, and sometimes without keys.
This means there are no deviations. It's a proof of concept for a security printing breakthrough.
However, these typically pave the way for normal runs (see birds of the world, based off of the breakthrough on mystery 1).
This means mystery 3 & 4 should pave for normal runs in the future with printed values.