Kind of a funny, not funny story about that black fingernail. I don't wear nail polish because I LOATHE chipped polish so when I saw her hand, I told her to go take that nail polish off "Right now!" She said "I can't Grandma, that's not nail polish...I shut my finger in the pickup door."l OUCH! Boy, did I feel dumb.
If I'm not mistaken, this looks like a View-Master from the 1950s or 1960s, before bright red plastic was used for the body? I did not expect to see this in a random display case in a Taipei café, since we never had them for sale over here.
Edit: looks like a View-Master model C from 1946–1955.