The Rolex Datejust reference 6827 in a midsize 31mm configuration featuring an 18k yellow gold case and a grey (slate/ghost) Roman numeral dial is a highly collectible vintage timepiece. Produced predominantly from the late 1970s through the 1980s, this specific iteration is prized by connoisseurs due to the striking luxury contrast between the warm 18k yellow gold and the industrial look of a sunburst grey dial.

• Case Diameter: 31mm, historically designated as a "Medium", "Midsize", or "Boys' size" model. It bridges classic elegance with daily wearability, fitting beautifully on a wide range of wrist sizes. 

• Case & Bezel Material: Solid 18k yellow gold featuring a crisp, signature fluted bezel and a screw-down twinlock crown. 

• Dial Variant: Grey / Slate finish adorned with high-contrast applied or printed Roman numeral hour markers. 

• Crystal: Vintage acrylic (Plexiglass) paired with the iconic magnifying Cyclops lens over the 3 o'clock date window. 

• Movement: Rolex automatic, self-winding perpetual mechanical movement (typically Calibre 2030) featuring chronometer certification.

• Bracelet: Most commonly mounted on a solid 18k yellow gold President or Jubilee bracelet, though it is frequently styled on aftermarket leather or alligator straps.