Yes, my Great Britain obsession continues . . .
1881 Queen Victorial 5d.
She's a bit bruised, but it was the cancel that caught my eye.

And it has me perplexed. Was this stamp really mailed in 1917?
The minute I saw it (and saw that I could pick it up for less than 10% of catalog) I snapped it up.

Now I am driving myself bananas trying to decode that parcel post circular cancel. I managed to isolate it . . .

I already have a better example of this stamp in my collection, but the color of the cancel caused me to adopt this (admittedly creased) 1887 Jubilee QV Shilling. All of the parcel cancels I have seen have been black.

Any reason why this one is bright blue? (Irish nationalism perhaps?)
Thanks!