Goerz Series III No.2 Double Anastigmat 7" (180mm) Lens in Bausch & Lomb 1891 Iris Diaphragm Shutter. The shutter is a very interesting iris diaphragm type where the shutter itself creates the aperture which is set by 2 dial on the top (front is speed up to 3 seconds and the rear is the aperture setting).
