The 36mm IWC mark XI is a comfortable watch to wear. I have ordered a bund leather strap for it from the net as I prefer leather strap versus nylon NATO strap. Even though the dial design is simple, it has a timeless feel. I am hoping to find a Mark X which will fit nicely in my small military collection. Collecting the dirty dozen will be. Fun project. I wonder how long will I take to complete the collection? Life is good!