This Graflex XL Carl Zeiss Planar 80mm f2.8 Lens is a 6 element lens designed to have a flat field.

 It is in a Graflex XL mount which will fit Graflex XL cameras, both the rangefinder as well as the standard model without a rangefinder. 

The diaphragm (f stops) move freely and there is no visible oil on the blades and none on the leaf shutter. 

The Synchro-Compur shutter has T, B, and 1 through 1/400^th speeds. The one second speed's timer is steady but sounds like about 2 seconds; the half second speed sounds like one second, and the rest of the speeds sound progressively faster. 

The 1/400^thsecond takes more effort to cock, exactly like my other 80mm Zeiss Planar. I see no fungus. There is some dust on the interior elements like most older lenses. Filter threads are undamaged. Markings are clear and it looks like it has careful use.