2.5/28mm lens OKS1-28-1, Rodina mount
The lens was made in 1964 (#645358) at LOMO.
Bit used condition. Mechanics is fine. No fungus, no scratches. Some cleaning is required due to dust.
The lens has Rodina mount, and purposed for 35mm movie cameras.
T/2.7-16, no click stops. Rodina camera has internal focusing mechanism, so you'll have to remove original lens mount and replace it with one suitable for your camera.