Crystal is a brand new, custom sapphire glass crystal for an Omega Speedmaster MKII ref. number 145.014. Crystal also fits case ref. 145.0014, 145.026, 145.0026. These crystal’s are the exact same size and look identical to the original Omega genuine crystal’s, only they are made of extremely durable, and scratch resistant sapphire. I’ve have one of these in my own personal Mark 2 and have worn it steady for 3 years without a single scratch or chip in it. They are extreme quality and made in Germany.