Originally Posted by AgX
The c/u adapter [of the Fuji Instax 210] also has a front-surfaced convex mirror to help you compose an arm's-length self-portrait.
Very interesting, I don't know of any other camera that has such.
It never hurts to look through ones own library:
The Minolta Disk 7 had a little convex mirror inserted in its front (plus a telescopic handle with release button).