Earlier this year I was impressed enough with the printing quality of the $1.20 Point Pelee coil stamp to inquire here on SCF about how it was technically achieved
Several weeks ago I received the $1.80 Naats'ihch'oh Park coil as franking on an
ebay lot. In removing the stamp from its envelope, I got another surprise. It is printed on the reverse side. The printing appears as a very light gray tone under ordinary light, but its effect is more dramatic under ultraviolet light, as shown in the scan below.
The full stamp measures 25mm x 21mm.


