
gettinold...There are many colour variations of this stamp...Two things affects colour quality.
1 - Changeling, atmospheric conditions to chemical and sun light.
2 - Printer attention to colour quality.
In high School I was trained a graphic artist/printer..Now these stamp were printed long before I was born and even in my time, colour quality was done by ink combination with a putty knife..What I mean is I would (GUESS) take an amount of one, two or three colour and mix them together and hope to mimic the colour originally done say the day before.
I would bet if we could get access to Canada Archives (stamp/post office literature and specimens)...We would more than likely see many difference shades.
Robert