Canada #1181-1183 $1-$5 1989-1990 Architecture Definitives, A Group of 4 Canada Post Official First Day Covers
4 official Canada Post first day covers, featuring singles of the $1 Runnymede Library, $2 McAdam Railway Station and $5 Bonsecours Market, plus a combination FDC of the $1 and $2.
The envelopes are all dull fluorescent flecked, except for the one containing the #1183 which is hibrite. I describe the properties of the envelopes for official FDC's because they are part of the official Canada Post Product, and are supposed to be standardized.
Unitrade cat is $23.70.