It looks like a photoshop of an executive jet that somebody swapped wings and engine nacelle locations. And pasted it to a single contrail.
And swapping parts form the same pic would make pixel counts match, not like cut and pasting Hillary's face onto a jet liner.
Single contrail = single engine, multiple contrail = multi engine. Except that as the multi ages, it becomes a single too. Not sure if that model executive jet with twin engines located on each side of the tail would make one contrail?
I watched a contrail just the other day. Low enough/close enough that I could see the turbulence breaking it into individual cotton balls. Funny thing I noticed about it was that the cotton balls kept moving too, right along the path the jet had taken. All the way until the contrail dissipated. I don't know whether that always happens, or whether the plane was in the jet stream which transported the contrail along. ???