Canada #555var 7c Deep Emerald Green Snowflake, 1971 Christmas Issue, a Very Fine NH Block of 9, Showing Print Smudge on 2 Stamps, High Fluorescent Paper
A well centered and NH bottom sheet margin block of 9 of the 7c deep emerald green snowflake stamp from the 1971 Christmas issue, printed on smooth high fluorescent paper, and showing a prominent ink smudge affecting two stamps at bottom centre.
Unitrade does not list ink smears, but they generally sell for $25-$30 when they are this prominent. So the block should be worth at least $30.
The block offered here grades 80 as follows:
Paper freshness: 5/5
Absence of visible paper flaws: 5/5