Whetstone Box

I'm not saying I'm the only one, but I bet we are a small club. Of people who can get excited by a box.

It's clear I am recently enamored with bento boxes, but an old wood box?

Treasure!

Look! It has pedestal feet! And double sides! And all that writing! I wonder what it says.

It measures 14 1/2 by 10 inches and it's 6 1/2 inches deep.

What do you suppose I should do with it?