Ran into this very nice setup at a local (Wethersfield, CT) farmer's market. Had a nice chat with the owner.
The oven is French and he had a custom copper dome made for it. It is removable. Five inches of insulation in the base with more above. The trailer is also custom. The oven floor temp is about 600 deg.
The dough is partially baked. It is a sourdough, starter from Oregon. Very tasty and I wish him well. Told him about the forum so perhaps he will check in.
That's about all I can remember. Pix below.