i've had a black one and a chrome one, and they are really well made, and look the nuts...very very rare too, however, dont command much money, so if your looking to add value to it by restoring it, then your wasting your time,
that said, if your looking to have a nice rare stem, then who knows, it depends on your motives really...
i rate them, i did however sell both , and replace them with tufnecks.