
Gatt: It's clearly a Serie 0 craft, as it has no wing cannons, but it does not have the slots for the gun barrels underneath the engine, on both sides of the oil cooler.
Serie 0 had 4x 12.7mm guns and 1x 20mm (through the prop).
2 were on top (like the C202) and 2 were on bottom (like the top, only inverted).
Serie I dropped the lower pair of 12.7mm because they were too dificult to service (due to their location) and put the wing guns in place.
So, it should either have the wing guns, or 2 more MGs underneath the cowling. It has neither!