Hi,

Can anyone help with this? I have what appear to be two Princess Wilhelmina
stamps of the 1894 issue that are postmarked in 1887. They are cancelled
exactly a week apart in the same city. The 8s do not appear to be modified
9s.

Image: http://www.mcgees.org/img/netherlands43.jpeg

Do people think these are authentic, and, if so, is there any premium to
them?

Regards,

Joshua McGee
http://www.mcgees.org