Man pages matching name locale::recodedata::iec_p27_1 in section 3pm:

Locale::RecodeData::IEC_P27_1.3pm.en	debian 10 / libintl-perl
Locale::RecodeData::IEC_P27_1.3pm.en	debian 11 / libintl-perl
Locale::RecodeData::IEC_P27_1.3pm.en	debian 12 / libintl-perl