picture of the box it came in

The box is labeled, Montgomery Ward. That was a mail order catalog company competing with Sears and Roebuck.

The reference link shows jewelry boxes similar to yours. There are 5 boxes - move your mouse pointer over the strip at the bottom of the illustration to make the others appear

Here is a link that might be useful: Mele Krista Girl's Musical Ballerina Jewelry Box with Fashion Paper Overlay

I found another similar example. This one shows where the ballerina is posed.

Here is a link that might be useful: Child's jewelry box

Is the door missing on your jewelry box?