German, Flour Bag Seal, Stettin, Schrot, Image & Found by Ilmari Karvinen.
Found in Finland, ?mm.
R. / SCHROT // (STE)TTIN(ER) / STETTIN / (WA)LZM(ÜHLE)
Schrot is used in German for whole grain with the R. most likely representing rye.
See p.15, Meelloodjes, een ‘verborgen’ geschiedenis, B. D. Poppen, "From the former German city of Stettin several seals are known, both of the Dampfmühle and of the Walzmühle. The Walzmühle was founded in 1838, located directly on the Oder, over which the grain was brought in by barges."
See METAL DETECTING NORÐMANNALAND, "Bag seal for rye flour. It was milled in Stettiner Walzmühle, founded in 1838 in Stettin, Prussia (present day Szczecin, Poland), which operated until its liquidation in 1905.
The ad is from the newspaper Fredriksstad Tilskuer, 1885."
