What does 早戻しボタン 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 早戻しボタン?

HTC first drew 早戻しボタン in Sense 7, released 2015年3月30日.

HTC Corporation has shipped 2 versions of 早戻しボタン. Each is dated, so you can see when the design changed.

HTC

HTC Corporation has drawn 早戻しボタン 2 times. Every revision HTC has shipped is below, newest first.

What does 早戻しボタン 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 早戻しボタン?: HTC first drew 早戻しボタン in Sense 7, released 2015年3月30日.
How many times has HTC redrawn 早戻しボタン?: HTC Corporation has shipped 2 versions of 早戻しボタン. Each is dated, so you can see when the design changed.

HTC artwork for this emoji spans 2015 to 2016.