Looks like a glass impression from an engraved gem. Idle guess would be Alexander the Great.
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Another example (not boulle):...
Is it easy to remove the clock from the case? It looks very much like a wristwatch and I'm just wondering if anyone produced a "set" that would...
It could be a lid as well as a magnifier: [ATTACH]
I'm not expressing an opinion on what kind of picture this is, but there are painting techniques that seek to very intentionally hide the brushwork.
What might it have looked like originally? Similar items were used as applique on boulle furniture: http://www.jansantiques.com/Lot/jac2376_19.php
18th C glass-making: https://glassian.org/Making/Diderot/crown_glasshouse.html
That's a beautiful piece of glass, and I would guess pre-industrial. Of course, glass can still be handmade today. The painting looks hand done...
If that center oval is as new as the rest, I would expect the image to be a decal. Can OP tell with certainty if it is hand painted or not? The...
It could be that the center oval was a piece of architectural salvage, and the surround is essentially new, but no idea how old that center piece...
Comparing the bottom of the Sklo to the bottom of the Durand might clarify things. If you can find examples of both. The bottom is a big part of...
The Grosvenor link tells most of the story. The print shown in that link is a title page, the title of the publication replacing the inscription...
Has a Sklo look to me.
It has a Great Gatsby-ish sort of appearance to me.
I think this mark is in Rontgen, if someone has a copy close to hand.
Actually I agree with both the previous comments. Any attempt at stain removal comes with real risk. I've done what blooey suggested a couple of...
What's the distance between the points?
It's a nice thing though.
"in some cases the publisher may get a large amount of book orders up front, and run a second, third, or even forth printing before the...
Separate names with a comma.
