They are the most complicated version of watch sapphire
Curved dials and hands with Superluminova for Elka X
Curved dials and hands for Elka D
The name is short for NATO Stocking Number, a term that simply refers to the fact that the bracelet could be purchased in the NATO supply shop.
The Milanese bracelet is also known as Milanese mesh bracelet, as it is made of intertwined loops (fine mesh)