German, Customs, Zollverein, Württemberg Seal, Image & Found by Max Northup.
Found in Southwest Germany, 23mm.
Crowned shield bearing the arms of Württemberg branches to sides and crossing below, K W STEUER CONTROLE STEEL curving down ZÖTTL(EN..) curving up around // 57, ring of mullets around, ZOLL VEREIN around
From Paul Cannon, "I think the coat of arms are those of the Kingdom of Württemberg in the south west of Germany Württemberg. ... It specifically mentions Zollverein, the German Customs Union which I think came into existence in 1834."