Yes! This is the rare piece of the Green set.

#820 Portage & Memorial is the stamp that is hardly ever printed. With #818 Robson Street and #819 Sainte-Catherine Street you would hold the winning combination for Career Jersey Mystery Box from Autograph Authentic.

Prize for the set

Career Jersey Mystery Box from Autograph Authentic ($1,500 to $6,000)

Prizes available

10 in Canada

Odds of the full set

1 in 54,347,993

Rare piece source

Every published list of rare pieces names this stamp.