Diamond Eternity Ring c.1950 size M

A pretty mid century diamond full eternity band.  
 
The ring has 21 diamonds each set within a bright cut design making the stones appear larger than they are.
 
The ring is beatifully low set with an open square setting to the back and has engraved sides.  Ring 2.7 mm in width and 1.8mm high.
 
Era: Mid Century, c.1940 - c.1960
Measurements: Total diamond weight estimated 0.50 carats
Ring size: M (UK) 6 1/2 (US) 53 (EUR) This ring can not be resized.
Hallmarks: Unmarked - tests 18ct white gold