Federal Octar 5.5 inch f6.3 enlarger lens lens mount_Exakta and can be swapped for

and can be swapped for other formats of rollfilm (6x6

This is a small brass lens for 3 1/4 x 4 1/4" cameras

The Minolta MD Rokkor-X 50mm f1

The Nikon DK-17M is a magnifying eyepiece for 22mm threaded viewfinders (like on the D3/D4/D5 series and the D800)

3 Novar Anastigmat lens in a three-speed Vario shutter

Federal Octar 5.5 inch f6.3 enlarger lens lens mount_Exakta and can be swapped forThe Federal Octar 5. 5 inch f6. 3 lens is designed for use on an enlarger or bellows. It appears to be a 34mm thread mount. Some wear on aperture dial, dust and minor haze on the optics, diaphragm blades have some fluid and wear that won't impact function.