it’s more of a hunch, I think the lines are a bit different. Yeah, I know. BUT, I found something pretty specific as well:
heliswiss Agusta-Bell 206A, notice tail rotor gearbox inspection window and old tail rotor gearbox cover with molded, protruding TR axle hole
N9422, one of liveries used in FI B206, notice old tail rotor gerbox cowling in great detail, BELL 206A
later has a grate or window but a slightly diff cowling shape - bent plate cut around TR axis.
Finally, flyinside in blender. Single piece with a molded tail rotor axle hole:
Exactly the same as in N9422 B206A
Does it mean the claim of 206B-3 is a lie? Not necessarily, there were conversion kits. They may have a 206A converted to 206B-3 via engine retrofit but the shape will be weird for a B-3 due to old airframe parts/lines