Omega

I've been in the market for one of Omega Dirty Dozen (army not RAF) watches for sometime, but given the age of the watches and my lack of expertise, I'm hoping someone can help me out with what to look for. I've primarily been looking on Chrono24.com ... 

. . . you go! This example belongs to a community member. If you have specific questions, please ask. I'm not knowledgeable about these British military Omegas, but there are a few experts around here. Art ...  

beautiful watch! Is that original watch face? I have a few that I'm looking at on Chrono24, I just want to make sure I'm not overlooking anything.