Advertisement of eyedrop "Smile" in 1931 (Showa 6 years).
You can feel the strength of erotic whirlwind at that time in the propaganda that "era of grotesque erotic passed away …". Smile is a historical eyedrop that is still on sale, but at that time a company named Tamaboshi company was selling (now Lion).

Source by 戦前~戦後のレトロ写真