its very rare - ive only seen this appear publicly and another at ap museum . its from mid 90s and in platinum with dial guilloche in gold. there are other guilloche dial types in platinum and gold but prob not more than 10-15 total - the dials were done ...
We have different cases, different dials (not just colors), different bezels, even a special crystal on the top one. We mostly now see different dial color for RO.