Puzzler, the "theft prevention" strokes are placed
on top of the stamp and across to the cover,
so that the stamp is "tied" to the cover.
(so the postal clerk taking the letter to the postbox cannot nick it
witthout having a stamp that is marked)
You can see the strokes end abruptly suggesting the stamp has disappeared
and as pointed out part of the cancellation is missing
The vendor had it as Afghanistan, well spotted BeeSee
I'll have to check
explanation:
