You have the Vigilant that was designed to burn coal, the “best of the three”.
There are other threads on the Vigilant coal burners, search “vigilant coal”.
I have the middle model, no extra belly bump on the bottom. The ash pan is behind the glass doors. They are a pretty stove, however the function with coal is a bit of a PIA. Lots of air leak potential, not a steel plate design so warping is a possibility if you over fire it. I got mine priced right then fell into a deal with a Harman MK II and never ran the Vigilant, partly due to the problems I had read and heard about it. Mine will be fixed up and sold off. The Vigilant makes a great wood burner; I also have an original one owner wood burning version and the coal conversion kit for it. Ok, I confess I actually have six stoves; the Mark II, 2 Russo’s, a Petit Godin and the 2 Vigilant stoves. The Vigilant stoves are going to pay for the continuation of my “habit”.