Watch Glossary

Transparent synthetic sapphire crystal used for case construction, offering exceptional clarity and hardness.

Synthetic sapphire used for watch crystals; extremely hard and scratch-resistant

Rolex's exclusive rose gold alloy with improved resistance to color fading and corrosion over time.

Solid metal links connecting band to case, versus hollow bracelet end links.

Corrosion-resistant iron alloy containing chromium and nickel, standard watchcase material

High-grade corrosion-resistant steel alloy with superior polishing and durability characteristics.

Medical-grade stainless steel with low carbon content, highly corrosion-resistant

Lightweight, hypoallergenic metal alloy offering excellent strength and corrosion resistance

Medical-grade titanium alloy offering superior strength-to-weight ratio and hypoallergenic properties.

Dial coated with tritium, a radioactive hydrogen isotope providing continuous glow without light exposure

Radioactive luminous material used in vintage watches, glows without recharging.

Sealed glass or metal tube filled with tritium gas used for constant watch dial luminescence

Original luminous coatings from older watch era, often radioactive and subject to patination

Pure ceramic material used for watch cases and components, offering extreme scratch and heat resistance.

Neutral luminous material that glows white or pale, used in some contemporary watch designs

Super-LumiNova formulation known for bright green glow and reliable luminescence performance