On the Silix website they show a full 6538 watch and a "Rolex Vintage 1" case.
Watch:
http://www.silix-prime.org/index.php...oducts_id=2145
Case:
http://www.silix-prime.org/index.php...oducts_id=4076
The watch case diameter is listed at 38mm and the case at 39.5 mm. Are these correct? My understanding was that all Silix 6538s were a millimeter or 2 larger than gen spec.