Schätzle (father) used number‑prefixed I·B stamps only during: 1848–1856 After 1856, the workshop switched to: I·B without number, I.B.S and J.N.S. (son’s mark)
Schätzle (father) only used thin oval wire spectacles on premium automata during a 10‑year window: 1848–1858
There are very few pattern 3 dumpling eaters known to have survived and we believe this is the best of the lot.