A cheap one that I snagged off
ebay and just received today.
On the label is printed "Geoffnet" or "Opened". I'm not entirely sure what's printed on the purple cancel.
I haven't seen too many censor covers, but most that I've seen have been opened around the side edges of the cover. This one appears, for whatever reason, to be opened from the flat side of the reverse (you can see part of the incision to the left of the label.)

-P.Bear