The General condition of huge box is good for the age;The White foam is white and not yellow due to dust or sun.
At time kyosho put a serial number on his 60 class heli. This is the number 25016. There is a mark on the box and on heli about this serial number. The mechanic is absolute new and it is 80% build in factory. There are not rust or dirty. It includes also an OS-61SF H engine with his muffler already fitted and ready to run.
It is an incredible piece of kit. I think is pretty impossible find a NIB caliber 60 at nowadays.