Italian-made, one-of-a-kind cameo lamp

Purchased at a workshop that I could not enter without an introduction to Italy. The cord has been converted to Japanese specifications. It has an inline switch.
I received various workshop certificates, but unfortunately lost them while traveling within Europe with my luggage. I am unsure if this is the same artist's work, but a dealer who purchased a lamp with a different pattern from the same workshop was selling it for over 1 million yen on a high-end e-commerce site for affluent customers.

This is a beautiful carved shell cameo lamp.
It looks beautiful both when lit and unlit.
I love cameo brooches, so I kept it on a display shelf without lighting it, just admiring it.
The motif is mythological, featuring a woman, child, and sheep, creating a calming scene. When lit at night, it emits a soft orange light that is very soothing.

At the time, the workshop still seemed to have an apprentice system, and everyone was carving very seriously.
It had a dignified atmosphere, not like a souvenir shop.
The carving is meticulous, and I loved the design, so I didn't pay much attention to anything else until after I posted it, when I realized there was no artist's signature carved. I watched the artist work on it at the time. I believe they were around 40 years old.
Since I loved the piece, I didn't pay any attention to the name.
I picked it up 4-5 days later after it was completed.

I posted yesterday that I would be willing to offer a slight discount if you like this lamp, considering that point.

Today, I've decided to change the price from 480,000 yen to 380,000 yen.

Height: Approx. 26cm, Diameter: 18cm, Largest circumference of the shell: Approx. 47cm. Diameter of the brass base: 14cm.
Please excuse any slight errors as these are amateur measurements.
The base is brass.

Thank you for looking.