Given said small size of the Realm's warstrider arsenal, do you see the one being deployed in the warstrider chapter fiction as being

a) In the possession of House Mnemon, a treasured (and maybe singular) family trust.
b) Loaned to the efforts of House Mnemon given the circumstances (ie a solar circle leading an important satrapy in revolt).
c) Acquired recently by House Mnemon, whether formally or informally, due to the growing corruption of the Realm.
d) Other?

I imagine like most warstrider things it can be dialed one way or the other depending on...