I had a similar thing years ago. I did the apprenticeship with my Grandfar as a teen. Then for several years, I after the Army, I traveled around the world with a backpack and hammer. I mostly worked odd jobs and for blacksmiths when ever I got the chance. That went on for over ten years. Then when I had the chance to blacksmith full time in my own shop, I took it. According to tradition, that made me a master blacksmith, that and the fact that several smiths told me I was ready to open my own shop. As, I stated before, according to tradition, master is the proper term.
There were some that did take issue with me putting the word master blacksmith on my business cards because either I had not gone to a "blacksmith school" or because Joe Blow the rag tag man at the feed store had different opinions than I did on different subjects.
Can I do everything as well as everyone else? Heck no! There are some things that I still have to work very hard at, such as symmetry. I even had an apprentice once, Jason Dingledine, had a huge natural talent for symmetry that was astounding. To this day, I still think he and some other blacksmiths out there turn out better work than I do, but that is okay.
I think my new shop is nicer that everyone's!