Austrian Porcelain-Count Thun 1905 w signature

I have a beautiful and nearly perfect centerpiece bowl that is marked with the Crown "Vienna" double shield "Austria" mark indicating being made in Count Thun's factory, probably assoc with PH Leornard. It is really gorgeous and in such condition that I hesitate to guess at it's value. PLUS - it is signed on the bowl itself "A.L. Qoe" as well as on the bottom "F.J.T. 1905".  There are also two embossed "X's" with a circle around them and a "72" which I don't know if these mean anything.

Can you please let me know what you think a good insurance value would be for this item?

Thanks!

Good