Another distinguishing feature of the design is that the lock-plate and the breech section (chamber) of the firearm are forged as a single piece.
To the last of these, this is a functional modification, such that the spring's location does not obstruct removal of the barrel for loading.
This is substantially different from the usual use of the term associated with Anson and Deeley patented shotgun design, where the firing mechanism is mounted within the frame of the firearm rather than off the sides of a lock-plate.
To load, the barrel unscrews (with the aid of a spanner) just in advance of the chamber recess, that is filled with powder.
Queen Anne pistols usually exhibit a high level of decorative finish and workmanship.