What does Bouton Effacer look like on HTC?

On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.

When did HTC add Bouton Effacer?

HTC first drew Bouton Effacer in Sense 7, released 30 mars 2015.

HTC Corporation has shipped 2 versions of Bouton Effacer. Each is dated, so you can see when the design changed.

HTC

HTC Corporation has drawn Bouton Effacer 2 times. Every revision HTC has shipped is below, newest first.

What does Bouton Effacer look like on HTC?: On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.
When did HTC add Bouton Effacer?: HTC first drew Bouton Effacer in Sense 7, released 30 mars 2015.
How many times has HTC redrawn Bouton Effacer?: HTC Corporation has shipped 2 versions of Bouton Effacer. Each is dated, so you can see when the design changed.

HTC artwork for this emoji spans 2015 to 2016.