Vintage 18k gold diamond solitaire bezel ring

Title: Vintage minimalist 18k gold and diamond bezel solitaire ring
c. 1950
Size: 5.75
Tech desc: A bezel set petite round brilliant cut diamond is partially inset into an 18k yellow gold band
Diamond weight/size: ~.10ct
Diamond color: H-I
Diamond clarity: I1-I2
Ring weight: 2.68g
Ring width: 4.85mm at widest (center front), 3mm at narrowest (center back)
Ring depth (max height atop the finger): 2.8mm
Hallmarks: "SG" (possibly makers mark), "750" (for 18k gold), "DIA" for diamond, "D.10" (.10ct diamond), "A" (to denote a year -- no province assay is present but matching the letter style, it *looks* to be from 1950 and Birmingham, UK)
Condition: Very good

As with all vintage and antique pieces, which are previously worn and loved, this piece's current condition is commensurate with age and wear throughout its life up until this point. Please review all item details and photos carefully and ask any questions you may have prior to purchasing.
As a general rule of thumb, it is best to wear and handle vintage and antique jewelry with care, i.e., do not shower or swim with them, wear them during physically laborious activities such as gardening, exercise, baking, chores, etc. We would also recommend you skip donning your favorite vintage and antique pieces if you'll be working with paint, bleach, chlorine, sulfur, or other potentially hazardous or abrasive chemicals or cleaners. This is not to say that every vintage and antique piece is too fragile to withstand normal daily wear, (they are not -- please don't be afraid to wear them!) but it is to remind you that each piece has traveled its own unique journey by the time it reaches us, and while we disclose their current condition, we cannot guarantee how much "mileage" any given piece has left before it might require a "tune up", so to speak