Hello,
About a decade ago, I bought a bone-carved dip pen with little holes in the handle, one of which contains a small bead of glass which, when held up to the eye, has a photograph of Jacob's Pillow Rock in it.
I am just looking for the term for such a bead/photo. The antique dealer I spoke to indicated that there was such a term, but couldn't remember what it was. I'm also kind of curious to know if these are find-able and collectible, as it seems the pen I have is meant to store more (I suspect something like a tour of the holy land).
Sorry for not having a photo of the pen. Photograph of Jacob's Rock was sepia coloured and captioned at the bottom.