That's a tablet, not a laptop -- a wax tablet installed in a wood frame, so the writing would be protected after the item was closed, and the message delivered to, for intance, another ruler.
I’d guess it’s a polished metal mirror with protective cover based on the way the woman on the throne is admiring herself.
Someone drank a lot of ouzo to come up with this.
Can you please tell me what the second line in your sign-off says?