This is a Rado Art Quartz, likely produced in the mid 80's.
The case is entirely tungsten carbide, and the caseback is stainless steel. The dial is a vertically brushed stainless. Indices are applied polished gold with an onyx stripe inset in each - a very cool detail. Crown is original and unblemished. Crystal is perfect.
The strap is a gold plated and period-correct. It shows some plate loss near the lugs but it's only obvious under magnification. I tried to shoot the photos to show the plate loss as "badly" as possible. In all other circumstances it's nearly invisible. Lugs are 20mm, which is a very common size, so you could throw this on leather or suede easily for a change up in look.
