This is a lovely platinum and single cut diamond band , there are 10 single cut diamonds of 1.7mm each white and eye clean,  the diamonds cover half of the band and there is engraving on the other half, the engraving shows some loss and the metal has that lovely platinum patina that you expect on a old platinum piece and it would make a great stacking band.

Weights 1.7 grams , stamped platinum , size 6 3/4 , 2.2 mm wide. Diamonds approx. 0.20CTW.