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Hello, I am looking to ID the following marks on a silver box: the first mark is a lion poissant the second mark is a crowned Leopards head and the third mark is a dolphin fish head down tail up.

thank you for any help that you can give me.[/img]

These are pseudo- or fantasy marks used by Gebrüder Dingeldein of Hanau Germany, about whom you may find more in this thread. Any further dating would have to be on stylistic grounds, but all the Hanau "antique" silverware manufacturers were at their most prolific in the late 19th and early 20th century.

Hope this helps!