Blancpain

Stainless Steel vs Zirconium Oxide ...  

Zirconium oxide (ZrO2), also known as zirconia, is a durable and versatile advanced ceramic with exceptional hardness, strength, and chemical stability. It is used in various demanding applications like high-temperature refractories, dental and orthopedic... 

The only appreciable difference is that the OC has slightly thinner hands and dots. But that doesn’t affect legibility because the lume is equally strong. It might be a little more elegant for this reason. The small difference in case size is not apprecia... 

Thank you! They are the same and yet completely different in feel. It’s a very pleasant experience to shift between them within my random watch rotation.