A stamp need not possess all the premium attributes in order to be a premium quality stamp. In fact it is virtually impossible to find a sound. large margined, perfectly centered, never hinged, post - office - fresh. The analysis of premium characteristics on a stamp-by-stamp basis is designed to help you know what to expect from each issue, to know when you can hold out for total perfection, and when you should be ready to compromise. Knowing the degree of difficulty of premium elements also assists you in calculating their value. And that skill will prove more and more useful because the demand for premium quality stamps is accelerating.