Pt 950-indicates that this metal is platinum (Pt, the abbreviation of platinum in English, is also a chemical symbol); 950 indicates that the platinum content is "950 per thousand".
ADKpt950 means "this is platinum produced by Edcom jewelry company, and the platinum content is 950 per thousand."
Edcom Jewelry Company is a jewelry processing factory. It is estimated that your Chow Tai Fook is processed by their factory.
Platinum PT950 is about 570 grams. There may be some differences in different regions, but it will not be very big. Even a region may fluctuate.
(Please set it like, O(∩_∩)O Thank you)