From Details magazine:

CNIB, 100th ANNIVERSARY Commemorative envelope
Issue date: March 21, 2018

It has been a century of change for the Canadian National Institute for the Blind in helping Canadians who are blind or partially sighted live full, independent lives. This commemorative envelope celebrates that achievement with photos from the organization’s past and present, including a short braille message embossed on the front of the envelope to mark the CNIB’s foundation in 1918.