What does Doppio Occhiello 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 Doppio Occhiello?

HTC first drew Doppio Occhiello in Sense 7, released 30 marzo 2015.

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

HTC

HTC Corporation has drawn Doppio Occhiello 2 times. Every revision HTC has shipped is below, newest first.

What does Doppio Occhiello 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 Doppio Occhiello?: HTC first drew Doppio Occhiello in Sense 7, released 30 marzo 2015.
How many times has HTC redrawn Doppio Occhiello?: HTC Corporation has shipped 2 versions of Doppio Occhiello. Each is dated, so you can see when the design changed.

HTC artwork for this emoji spans 2015 to 2016.