1918 German censored field postcard, Reval/Tallinn-Mülhausen/Mulhouse, Elsass

Sent by German solder from Reval/Tallinn. Blue rectangular censor cachet applied in arrival in Mülhausen, Elsass — Mülhausen P. K (Post Kontrolle). See similar cachet in more readable form at https://shop.postiajalugu.ee/item/1918-german-field-post-reval-muhlhausen/