Extremely well done United Airlines 747 tail number N4713U desk top display model measuring nearly 22" long with nearly 20" wingspan.  Came from the estate of retired United pilot.  I believe this is wood.  No material blemishes.  No box.  No manufactures mark, but this is obviously a high end model.  

Interestingly enough whether done intentionally, just coincidence or built prior to 1989 the tail number used on this model is the same ship that in 1989 shortly after taking off from Honolulu enroute to San Francisco experienced a cargo door failure leaving a gaping hole in the fuselage.  The ship returned to Honolulu and was subsequently repaired and returned to service, but under a different tail number.