Northwest Boeing 747-400 plastic model (push-fit)

This is a model I've had for a long time, and like most of my collection, it's done a fair share of mileage with me on my various overseas postings. Unbelievably, there's no damage, especially to the -400's winglets, the only gripe I have is a 'browning' where it was exposed to sunlight when I kept it on display on a window sill.
Apologies for giving the measurements so I'm unable to give the scale. I'll measure it's length and wingspan so perhaps someone can help. Given its size and quality, I definitely think its a travel agent/tour company promotional piece.
I'll post the measurements in the next few days. :)