Rare 9x12 cheek chamber
 Body in varnished walnut and bellows in red leather
 Clairin Aplanatic Lens No. 8332
 An aplanatic lens is an optical system that allows for the absence of image distortion.
 The cheek chamber is a particular type of device.
 Made at the end of the 19th century, these are bellows devices whose rigidity is ensured by two trapezoidal wooden side pieces.