This is a somewhat uncommon 35mm Canon finder. This is a later era black model designed for use on the Canon bodies that have a parallax correction pin on the accessory shoe (VT, L, perhaps some others). It can of course be used on other camera bodies, but there is no parallax correction (which is small for most usage at a 35mm focal length).
Sold with original fitted case. Stunning build quality all around. Great condition. Makes a beautiful set!
Price: $75 plus shipping