Machine summary:
"Traditionally in the English language philosophy actuality, existence and reality are treated nearly as synonymous having clearly a modal connotation; the contemporary common understanding of reality is based on that.
It must be axiomatic that by the second modal category Kant means Wirklichkeit, actuality, to be the case, standing of a state of affairs.
Although belonging to different groups of categories, there is anyhow an intimate relation between the categories of reality The concept of Reality in Kant's critical philosophy 161 [RealitSt] and actuality [Wirklichkeit].
Actuality denotes the standing of a state of affairs [Bestehen eines Sachverhalts], The suitable starting point is to try to understand Kant's famous thesis that being is not a real predicate but indicates only positing a thing.
Real predicates determine the reality of a thing by affirming or negating its predicates, but according to Kant they leave it totally open whether a thing The concept of Reality in Kant's critical philosophy 163 also exists.
Kant's example of possible and actual hundred thalers illustrates his modal theory(A599/B627), and again in a way, which can only be conceived if reality [Realitdt] is taken in the scholastic sense.
It is certainly not difficult to conceive what Kant means by saying that as far as their reality, that is, their thing-content is concerned, possible thalers and actual thalers are equal.
However, the example employing the modal notions of possibility and actuality is presented in the discussion concerning the concept of existence."