a coffer or chest made of iron or copper (see Molina)
tepuz petlacalli. cofre, o caxa de hierro, o de cobre. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 104r. col. 1. Thanks to Joe Campbell for providing the transcription.