History: German officers playing cards wearing gas masks, WW1 (Colourised), [563 x 389]

https://i.redd.it/8ojfjhpwx6s01.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/8ckoq5/german_officers_playing_cards_wearing_gas_masks/?utm_source=ifttt