My first question would be if it were bronze or a resin composite? Many famous and not so famous statues have been copied and have no foundry or artist signature/mark. I'm sure many of your animal bronzes are signed and maybe some have a foundry mark. The nude appears to me to be from a modern rendering but that's only a guess. Bronzes, unless from a famous artist and are original, are in a state of funk as far as worth is concerned.