The Leeds Phosphate Works Ltd. Basic Slag Seal, Image by StuE, Found by Jammy Ged.
Found in Yorkshire, 20mm. 15.6g.
Very faint lettering on front side in five lines one under the other only the following can be made out with any certainty - HE // (D?)S // ATE // WORKS // LTD. interpreted as THE LEEDS PHOSPHATE WORKS LTD. On the other side in two lines is -SIC // SLAG interpreted as BASIC SLAG.
See other Leeds Phosphate works (Star of David) seals.
This is a British seal from Leeds but the owning company is German (Hoyermann Phosphate Factory, Hannover) - See BSG.BS.02017.