Locale::RecodeData::CP1251(3pm) on Linux
The text f64dd4b49f2a, as Debian 10 (Buster), Debian 9 (Stretch) shipped it.
Conversion routines for CP1251
The text f64dd4b49f2a, as Debian 10 (Buster), Debian 9 (Stretch) shipped it.
Conversion routines for CP1251