Hello David.....
The difficult part is determining a #158 from a #184....the only real difference is the paper type.
#158 is on white wove paper........#184 is on soft porous paper....most people rely on the "snap test"....white wove snaps audibly, soft porous does not.
#147-minor shading under leaf, lighter shading around center oval.
#158-dark shading under leaf, dark shading around center oval.
#207-dark shading under leaf, short shading around center oval and a short line under "ts".
