German, Flour Bag Seal ALTONA, Image by Donnydave Found by Linnet (James T. Britten).
Found in Yorkshire, ?mm.
Could be ALTONI across the middle. An R with II? on other side.
See German RM II flour bag seals.
From Paul Cannon, "I believe the central inscription reads Altona, a district of the German city of Hamburg through which the Elbe flows which had significant flour mills on its banks. The following links to a short history of what may be the mill, [Link no longer works] J.P.Lange Söhne Getreide-Mühle Altona Hamburg 2 Seiten Große Reklame 1923. Based on this, the poorly preserved inscription might be reconstructed as J. [P. LA]NG[E S]ÖH[NE] and ALTONA. Nothing survives of the lower wording. R II is the grade of flour and probably stands for Roggen (Rye)."