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The date shown is the date of issue of that specific variety. A "blank" means the item does not exist. An "x" or "(pl #)" indicates that that variety exists but a release date is not known.
Type Differences
| 10c Forest printing differences |
| Type I |
The foreground (around 'Canada') has "screened" effect. |
| Type II |
The foreground appears nearly "solid". |
| 15c Mountain Sheep printing differences |
| Type I |
Hillside is light. |
| Type II |
Hillside is much darker. |
| 25c Polar Bears printing differences |
| Type I |
Polar bears and shadow are light. |
| Type II |
Polar bears and shadows have a solid and dark patch of colour added. |
| 50c Seashore printing differences |
| Type I |
Cliffs are light; surf is light; '50' is dark. |
| Type II |
Cliffs are deeper colour; surf is not white. |
| Type III |
Colour of '50' and cliffs are same intensity (only found on perf 13 1/3 and called "Type II" in chart above). |
Tagging
Three types of tagging were used on these values:
Winnipeg, General OP-4 and General OP-2.
The General OP-4 tagging is notorious for "migrating" - the tagging material
will bleed across the stamp, and onto other stamps and materials that are in contact with the tagging for prolonged periods.
OP-4 tagging was superseded by OP-2 tagging in 1972.
Here are other examples of the 25c value, showing the OP-4 migrating tag as it
appears passing through the top selvedge. On some single stamps, this kind of
tagging may be very difficult to see, perhaps even giving the impression that
that the stamps are not tagged. Be very careful in identifying these.
Here are examples of the OP-4 migrating tag on the 50c value, including what it
looks like on the back of the stamp.
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