Have you ever thought of a watch in your collection that only exists once on this planet? This might be the one, and apart from that it´s an extremely beautiful wristwatch. Reffering to the former owner, and also our own evaluations, this is a prototype of an allready very rare watch. The condition of this 36mm chronograph can only be rated with near NOS and it has always been in this configuration, as for example the screws in the movement seem to have never been opened. The only little signs of a barely wearing are shown by the original vintage omega leatherbracelet that comes with an exceptional cool omega buckle by the way. So what are the differences to the usual 145.017 version. The first thing you would realize is the main handset with a longer minutehand and a longer lumezone. the original tritium in those hands is matching the color of the tritium lumeplots on the flawless dial perfectly. Also the outer shape of those hands is exactly like the more usual ones. It´s clear that those hands have always been in this watch, combined to that dial. There are two more points that proof us that this must be a prototype. No 1 is a missing serialnumber on the metal part of the movement where it would have to be normally (the screw had never been opened). No 2 is the correct caseback for that watch, not yet with omega engravings in the inside but saying „9-68“ instead, and „860 lemania“ on the outside. 1968 was the year the omega 860 was released. As far as we are aware of, the lemania 1872 was only called 860 when being produced for omega, so it´s very interesting that both words, „lemania“ and „860“ are engraved on the caseback at the same time, what would have been avoided for copyrightreasons in general. Another clear sign that this must be a watch that was only meant to be for internal usage. We have tested the movement for a week now and it is running perfectly in all functions with no service being needed. This, probably one of a kind piece, is one for a true connaisseur.