Condition grading can sometimes be very confusing as it is a subjective evaluation and even veteran experts may disagree on some points. The overall quality must be taken into consideration before a grade can be determined. Many points must be examined in detail, both front and back, before a conclusion can be made. A close study of the centering, the perforations, the cancellation and the paper must be made in order to determine the presence of any hidden flaws. A very fine appearing stamp may under close examination be downgraded to fine or even to defect. This knowledge is necessary and very important as the grading of a stamp will dramatically influence the price of a stamp.
The 2012 edition of the very popular Unitrade Specialized Catalogue of Canadian Stamps is expected very soon. It is expected to start shipping to stamp dealers by mid October and is now available for pre-orders. This is the ultimate reference for every Canadian stamp collector, including BNA colonies: British Columbia & Vancouver Island, New Brunswick, Nova Scotia, Prince Edward Island and Newfoundland . It is printed in full color. Most varieties and errors are listed. It also includes booklets, FDC, blocks, postal stationery & Canada Post souvenir articles. All stamps are numbered according to the established Scott numbering System.