Sorry to disagree, though it is hard to "prove". That is in the period where the aberration due to the "non-counting" of the starred receivers has maximum effect.
That number well could be late in 1882, and, it is pretty hard to confuse the cartouches, even if blurred.
205617 (an "1879" Cadet) was definitely made in 1882, and, while I do not have the notes at my finger tips, higher numbers than that are known with legitimate SWP/1882 stamps.
The oft quoted list in the back of Waite-Ernst is handy to have, and waay better than nothing, but needs to be carefully interpreted, especially the early 1880's. For some reason, the discrepancy dwindles to almost nothing by end of production.
I never believed there were SO many STUPID people in this country. Start working now to take the Senate in 2014.