A well centered and very fine used example on piece of the 25c multicoloured Sugar Maple stamp from the 1977-1982 Floral & Environmental issue, showing a 3 mm partial horizontal tagging bar on the bottom half of the stamp. The stamp has a mottled background.
The medium value tree stamps of this issue can be found with background colours that appear solid and dotted under magnification, and with backgrounds that appear mottled. This is not mentioned in Unitrade, but I consider this to be a collectible difference.
The Adminware tagging database lists this error at $20 for fine used.
The stamp offered here grades 78 as follows:
Margins/centering: 40/60
Paper freshness: 5/5
Colour: 5/5
Impression: 5/5
Absence of visible paper flaws: 5/5
Perforations: 10/10
Cancellation: 8/10
