It is clearly a LearJet... model 23, 24, 25, 35, or 36. Without knowing what engines it has and a good sideview I can't figure it out any closer than that.
Somebody might be able to tell by looking at the engine nacelles if the engines are the GE
Turbojets or Garret Turbofans.
Stop drop and roll will not save you in hell. --- seen on a church marque in rural Virginia