Korea Post listed a commemorative postmark for the stamp exhibition marking 100 years since the promulgation of Hunmaengjeongeum, the Korean Braille system. The mark was issued on 3 November 2026 for use at Nam Incheon Post Office on 3 and 4 November.

Designed by Kim Mi-hwa, it features a portrait of Songam Park Du-seong beside Braille dots. Korean lettering around the portrait names the centenary exhibition and Park. The official specimen bears the Nam Incheon office name and the date 2026.11.3.