I am far from an expert on variations of case treatment but RGP is better and most I have seen from this time period have been electroplate. I don't think that's a bad price for a watch in very good condition. The box alone usually goes for $20 or more. Sometimes we pay more than the going price for something we really want. I sure have! :lol:thanks, I am very pleased with it and the price I paid( $76.00). I am not an expert by any means so I may have overpaid but I am happy. The markings on it says 10k RGP. I was not sure if that is special or not. This was my first vintage purchase.