I have 3 of these lenses. Each one has some dents on the front barrol of the lens. I am not sure what the brand of the lenses are.  It appears to be similar to or is navitar bolex or computar? The glass is in good condition as well as the aperture and the focus. I loaded a video that I took with each lens. The lens also have writen in blue sharpie 1 2 or 3 on the mount to tell the lenses apart.  They all pretty much perform the same on the camera. I used them on a gh2 with a c-mount to micro 4/3 adapter.  This lens covers the whole sensor so you do not have to use it in teleconverter mode. 

I will ship to other country's if you pay the shipping. 

The lenses are auctioned as is. 

I have 5 lenses auction off 3 to save money up money for another lens for school.