Generally, the Montblanc Boheme has a quartz movement. So, it doesn’t use batteries, just power cells. Their cases are made with stainless steel which gives it hardness, toughness, and a bright shine that doesn’t wear off. This watch is specially made for women. They all have jewels shaped as gear bearings that reduce friction and increase the life of the movement between servicing. Their bezel is made of steel while the glass is made from sapphire which is transparent, scratch and shatter-resistant while being almost as hard as diamond.