What does 逆再生ボタン look like on Facebook?

On Facebook it is the design shipped in 16.0, shown above at full size. Older revisions are listed beneath it.

When did Facebook add 逆再生ボタン?

Facebook first drew 逆再生ボタン in 2.0, released 2017年2月20日.

Meta Platforms, Inc. has shipped 12 versions of 逆再生ボタン. Each is dated, so you can see when the design changed.

Facebook 3.0

Facebook shipped a new design for 逆再生ボタン in 3.0, released 2018年12月2日. The previous design is shown beside it.

✳ marks a release that redrew this emoji. The rest re-shipped the design unchanged.

What does 逆再生ボタン look like on Facebook?: On Facebook it is the design shipped in 16.0, shown above at full size. Older revisions are listed beneath it.
When did Facebook add 逆再生ボタン?: Facebook first drew 逆再生ボタン in 2.0, released 2017年2月20日.
How many times has Facebook redrawn 逆再生ボタン?: Meta Platforms, Inc. has shipped 12 versions of 逆再生ボタン. Each is dated, so you can see when the design changed.