3 Vintage Wire Fox Terrier Miniature Bisque Figurines Marked I Sp 1840 Germany

Vintage, miniature Mama Wire Fox Terrier and her two puppies, made in Germany. Largest dog is marked I Sp 1840. One of the pups is marked Germany. The other pup is also marked, but it’s hard to read. Looks like it says Germany. German bisque figurines measuring between 3/4 of an inch and 2 inches tall. See photos with ruler. Nonsmoking home