The Monmouth and Pembroke both feature a sapphire crystal (which is further enhanced with an anti-reflective coating). Renowned for its durability, scratch resistance, and clarity, sapphire crystal is an ideal choice for a versatile watch designed for every occasion.
The term sapphire is often used to refer to any blue gemstone, but in the context of watches, it generally refers to a specific type of crystal made from corundum, an extremely hard and durable mineral. Sapphire crystals are created through a process known as crystallization, in which the corundum is heated to a high temperature and then cooled slowly in order to form a crystal structure.
One of the main advantages of using sapphire crystal in our watches is its extreme hardness and scratch resistance. Sapphire crystal is one of the hardest materials known to man, second only to diamond in terms of Mohs hardness. This means that it is able to withstand the rigors of everyday wear and tear, making it an ideal choice for watches that are exposed to the elements on a daily basis.
In addition to its durability, sapphire crystal is also known for its clarity and transparency. This makes it an ideal choice for the caseback of the Pembroke, which displays the automatic Seiko NH35 movement of the watch.