From an article about an exhibition of household tools and devices used during the Meiji period:
炭火アイロン: 明治時代で使っていた道具。
フタを開けて火のついた炭を入れて、その熱で布のシワをのばします。
A charcoal iron: a tool used during the Meiji period. You open the lid, put in lit charcoal, and use its heat to smooth out wrinkles in cloth.
炭火
すみび · SUMIBI
Charcoal fire.