Insect cage, Showa retro

This appears to be an insect cage.

I'm not very familiar with it, but I was told it's an insect cage when I received it.

The inside of the cage is made of glass.
The cork lid is stuck and cannot be removed, so I am listing it as is.
I am concerned that trying to force it open might break the glass and cork.

This is an old item, so please understand this point before purchasing. Thank you.