What does 倒退按钮 look like on OpenMoji?

On OpenMoji it is the design shipped in 17.0, shown above at full size. Older revisions are listed beneath it.

When did OpenMoji add 倒退按钮?

OpenMoji first drew 倒退按钮 in 1.0, released 2018年4月18日.

HfG Schwäbisch Gmünd has shipped 11 versions of 倒退按钮. Each is dated, so you can see when the design changed.

OpenMoji 12.2

This is the design OpenMoji introduced in 12.0, shipped again unchanged. It was not redrawn for this release.

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

What does 倒退按钮 look like on OpenMoji?: On OpenMoji it is the design shipped in 17.0, shown above at full size. Older revisions are listed beneath it.
When did OpenMoji add 倒退按钮?: OpenMoji first drew 倒退按钮 in 1.0, released 2018年4月18日.
How many times has OpenMoji redrawn 倒退按钮?: HfG Schwäbisch Gmünd has shipped 11 versions of 倒退按钮. Each is dated, so you can see when the design changed.