Looks like Albanian stamp
Indeed, Albania 1 through 19.
"EXCELLENT counterfeits exist of 1-19."
Personally I do not touch these, beyond my capabilities to assess,
and full of danger.
Send away for a certificate.
I'd be very sceptical of the example shown.
If it is Sc#8 you have a c$500 catalogue stamp.
Personally, I would be telling my friend first.
Then share the cost of a certificate.
PS. The image is very poor for assessment, (Similar to your doctor, assessing your bad cough from the next room)