Summary : watched a cylindrical, clearly metallic, resembling shiny aluminum, somewhat rounded object hovering on nearby hills, moving pendulum-like in and out of sight over top of the hill, at about 2000 feet at most. It suddenly dissapeared with a very fast vertical movement. no sound heard.About one or two in the evening, in broad daylight, no clouds, object was seen hovering nearby mountains, not above but in front and then behind of the top, particularly strange movements, pendulum-like, fast and then slow. Cylindrical shape, clearly metallical and shiny like polished aluminum, no lights, perceived some rounded form in the middle, perhaps ring shapes on the top and bottom, probably sizable object of about 20 ft. long and 6 ft. wide. No balloon, aircraft or any other object in the sky. Was observed on rural area of Peru. Object clearly seen in front of mountain background, no sound heard. Object aparently disappeared but witnesses perceived very fast movement upward, in a northern direction. Event happened when I was about 12 or 13 years old, in 1966 or 1967, maybe thirty years ago. I just want to know if this kind of object or similar sighting exists in your archives or database. It not only was real, is a vivid image that for 30 years I been wondering about. I don't want explanations, I am not an ufo believer, but I have seen what I have seen, nobody believes it really, but for me this is not a matter of faith, is just something I saw as a boy and can't find no explanation for it. Please let me know about it, specially this rather strange object, diffrerent from the classic ufo's that everybody knows.