Used- Coating loss back and front. Taken apart and cleaned best I could. Lens works. Tested on my Sony A7r (Moon shot sharp), rack and pinion focus works well. This Kilfitt Sprts Fern Kilar 400/4 is in excellent cosmetic condition. Lens does take a nice picture. Aperture is 16 blades, works nicely. Focus is smooth, works well and has tightened control when used by you. Amazing tech for a late 1950s lens. The lens is a huge 150mm diameter double element and coated. Very RARE to find on eBay in the USA!