It is definitely a Daum weight. I remember selling these around 1977 seventies (when I was still at school?
) in the days when our family gallery, Coleridge of Highgate, was a Daum distributor. I think it could have been in the range from around 1975 but I'm not certain.
It was one of my favourite pws at the time, although terribly expensive, and therefore difficult to sell! I think (and my memory is not what it was) that it retailed for about Â£45 at the time, which is probably why it stayed on the shelf for a while.
The "gold" inclusion is mica.
It is difficult to see from the photo whether the pontil mark is on the polished base. If it is, it probably should have been ground out and then polished, but probably slipped through the very high quality control that Daum had. This is very unusual.