Vintage Boxed 3-D Postcard Millersburg Indiana w 8 Shells, Multi-Colored Glitter

Description

This is something I have never seen before. Vintage postcard (my guess is circa 1907-1929) that has a box to go with it, where you address recipient. Fits perfectly. You need it boxed because it has several seashells attached to it. I think they are actual seashells and they are irridescent.
There is also artistic use of glitter , using color gradiations.
There should be 5 small tiny metal colored disks, too, but 2 of those are missing.
Wonderful, unique, addition to a postcard collection.