I found a lovely box in an antique store. The seller only told me that the box was manufactured in Great Britain, nothing else... I was aware of the lion and leopard's head hallmark at the time of purchase, so I bought it.
Meanwhile I believe that I have identified century with help of a book. As per my findings it has been made in the 16th or 17th century. The book I used: "Silberstempel aus aller Welt", translated: "Silver hallmarks from all over the world".
The box itself:

The hallmarks:

The hallmark in between lion passant and leopard's head is the one that confuses me... what is it? Snake? Dragon?
Would be great if someone could help!
Thanks so much & greetings from Germany
Werner