Thank you very much for that usefull info!
That certainly gives me some names to do some of my own research.
Yes it looks solid to me, I must admit that I assumed based on the amount of gold it would be a relatively well known brand. Also, this gentleman says they are mostly from the 50s but my mother got hers in the 60s and believes it was already vintage then. Any ideas on the date, I guess the R gives that away but I can't find a match.
I did open the back to get some info but it's so complicated I didn't want to break it!..
Would the value of this be purely on the price of gold? Not that mum would ever sell it.
Thanks again and any info you guys will surely help