This Victorian Plaque Ring is gorgeous.  The natural, European cut diamonds are mounted in platinum.  The fine details on this ring are beautiful.  
Date engraved in the ring:  1938
 
Gemstone - Natural Diamonds
Cut - Old European
Carat - .38 ct total estimated diamond weight
Color - very white - G for better 
Ring size - 5 1/4 (can be sized down to 4 and up to 7)