I have a box packaged identically to yours, but Grade 3. My box is unopened, but has a slight imperfection in one corner of the box. Yours looks more prestine and would thus be more desireable to a collector. I purchased mine with the intent of printing on it some day.
On another note, I expect the older stuff lasts longer than the newer stuff due to ingredients that have been legislated out of existance such as Cadmium. I'm sure PE can shed some light on this.
I'm sure Ron will correct me if I'm wrong, but I recall his having said on this forum that cadmium was never used in Azo.