Fly high with BlurryRobot!  This model is simple and in fact somewhat crude in detail, with overly large landing gear and windows suggested by simple round holes, deeply molded and not too evenly set!  But its twin fuselage mounted engines, conventional tail, and distinctive fuselage-top strake blended into the fin, mark it unmistakably.  It's a Sud Air Caravelle, and this is a very early plastic model of that plane, perhaps made as an airline promotion.  Scale is quite close to 1:300, based on wingspan.   Its original owner and possibly assembler, painted it with a white paint of not very high quality, and that paint remains as it was, though yellowed with age.

This model probably dates back to the very first days of plastic models, and may well have been produced when the real Caravelle was brand new.  

Sold as is, as an interesting part of model-airplane history.