First use this guide then at the bottom of the page select your stamp
Does the stamp have a grill on the reverse?
The grill seen on the reverse of some stamps
If your stamp has the a grill on the reverse you have quickly identified the stamp. It is the first printing of this stamp from the National Bank Note company and is #142. If it is does not have a grill it is #153.
SELECT YOUR STAMP Click the number below that most closely matches your stamp