Confederation Helvetic - It means Switzerland.
The letters plat is short for platinum.
mon plat means 'my dish' in English.
un plat à emporter is a takeaway dish in French.
Plat stands for Platinum, and the 900 indicates purity, or 90% pure.
PLAT engraved on the inside of the ring indicates that the ring is made of Platinum.
favorite dish
"Now or Formerly"
Map
Iron Pin Found
Plat refers to the shape and measurements of the piece of land you are placing the footprint of your house on. Plat maps show this information, usually within a neighborhood.
The ring contains 10 percent platinum,
CH = "Confederatio Helvetica" = Swiss Confederation