Cigatette case and an unusual snuff box

[Craciunescu78]

First are a few questions about this cigarette case, Austrian, from the 30s, not something out of the ordinary, other than the fact that it has these gold inlays.
Then things get a bit complicated, it is a matter of volume and density. I tested the gold and it was a positive for 14 K, but at a combined surface of 18x92 mm it gives a weight value of over 10 grams at a thickness of just 0.5mm. Just from a normal gold volume calculator.
Basically, the gold is worth more than the silver. 125 gr in total.
My question is , is there an noninvasive way to find out the thickness of the inlay ? Or from your experience, if you had the chance to see one “disected”. Also what is the minimum thikness that can hold an engraving ? This can be a clue as the all the bands are the same hight.

The snuff box is the result of an impulse buy .
There are no markings of any kind, the rim tested positive for 14 k gold, negative for 18, but it took some time, for a bit it looked like a positive on the 18K too. Maybe something in the middle ?
The case is ivory with I think tortoise shell hoops on the rims Other then that is just a guess. Do they belong toghether ? Or its just a medallion someone planted on a later case? The miniature looks correct , clothes on the sitter look like from the 1770-1780s. The piece is Austrian in origin. Looked like Mozart to me, but i hope not. Rather have an “usual” nobleman from that era, then something that could have been painted much later.
Any thoughts will be appreciated cos I’m out of my element on this one.
The case is 7 cm in diameter, height of 2.2, the portrait 5 cm by 4, with the frame, the frame about half a centimeter wide.

[PinkCarnation]

I’ll start with the snuff box. Not quite sure if you are looking for authenticity or value. Ivory and tortoise shell were used in combination in “objets de vertu” as called in the trade. Small pretty things. I wish I could hold it and look through my loupe to examine the lid and the underside craftsmanship to see if the miniature is original. Since there are no pry marks on the rim on top seems to be original. Is there a clear top on the portrait covering the painting? The with a loupe I would look to see if the man is painted on an ivory slice which was common and the quality of the painting. Being Mozart is a plus those snuff boxes were the height of fashion item to show off, Mozart being a current “Star” to be shown off much as we use designer logos and even Hello Kitty.
I did an image search on the face and found IMHO it is him after a famous portrait see included.

As for the cigarette case again not quite sure if you are looking for authenticity or value.
One noninvasive way is calipers the gold is a top layer so that might be tricky. As for the depth of the metal particularly of engraving I believe that a jeweler can answer that since they do the engraving as well as the engraving removal.
Aer there marking on the case indicating the silver as in hallmarks or the gold?
All in all a nice case.