This is a vintage Rado Diastar Original men’s wristwatch, Swiss made in the 1970s. Known as the world’s first “scratchproof” watch, the Diastar line features a hardmetal (tungsten-carbide) oval case with a stainless steel back and Rado’s signature moving anchor logo on the dial.
Details:
   •   Brand: Rado
   •   Model: Diastar Original
   •   Movement: Automatic (self-winding, Swiss made)
   •   Case Material: Hardmetal / Stainless Steel back
   •   Dial: Black with silver-tone hour markers, luminous hands, and date window at 3 o’clock
   •   Crystal: Sapphire (scratch-resistant)
   •   Bracelet: Original Rado-signed NSA stainless steel bracelet (Pat. 434845)
   •   Caseback: Features Rado anchor medallion with stars, engraved “Watersealed – Stainless Steel – Swiss Made – Diastar”
   •   Era: 1970s vintage
   •   Condition: Pre-owned, vintage condition. Shows light wear consistent with age. Keeps time (if running—update this based on whether it works). Original bracelet included.
   •   Size: Approx. 36–38mm case (without crown)
Notes:
This watch is being sold as-is, with no box or papers. The original NSA bracelet makes this piece especially desirable to collectors.