French,SIMPE Seal, Image & Found by Ianexplorer.
Found in North East Wales, 20mm.
Possibly image of a key with inscription around, ST ... (AE?)?YS curving downward above and *SIMPE* curving upward below. The other side has at least two lines of writing straight across, ST..D.. // SAE(Z?) and a dash dot dash design below.
Probably French but no product, company or location has yet been connected with this seal.