Taunton Penny Posts - part 3

Continuing on the same track, here is an entire from 1831 with an unboxed "No.6" from the Williton Receiving House.  I've got a few questions about the postage marking of "6" (see the write-up).

A couple of examples of the unboxed "No.7" (Washford) from 1833 and 1836.

And finally an albino strike (so it is very difficult to see) of the unboxed "No.8" from the Trull Receiving House.  Was this strike albino because the Receiver had to pay for his own ink ?