Rare Erkennungsmarke Bttr. 21. CM Mrs. Nr. 691 – 21 CM heavy howitzer

Rare Erkennungsmarke reading Bttr. 21. CM Mrs. Nr. 691 indicating Eisenbahn-Batterie 691 which was a rare unit which was outfitted with the large 21 CM heavy howitzer guns. It was first called Schwere Artillerie Batterie (mot) 691 which was outfitted with 3, 21 CM Mörser. It was renamed to Eisenbahnbatterie 691 being issued large captured French 24cm heavy howitzer guns. The Erkennungsmarke is in very good condition. Finding a Artillerie Erkennungsmarke might not be the rarest; finding them of a Railroad artillery unit who were issued with the immense large train mounted 24 cm howitzers is very difficult!