s/n - excellent cosmetic condition - no major wear or tear - optics are clean and clear of haze fungus and scratches, - lens coatings are excellent, - comes as shown with rear cap, contax filter and GF 21 finder. please note apeture ring only lines up when attached to a body, this is by design of all contax g lenses, if not coupled to a body the ring will not align, had issues in the past where buyers are not aware of this prior to purchase