Another example is shown at the top of this page. During the 1890's a rich and interesting array of advertising covers are found in the domestic mail. Covers bearing advertisements will command a considerably higher value in the market place. Click here for images of Domestic Advertising Covers. For those collectors who desire the purity of commercial covers, some domestic covers create problems because they appear at first glance to be commercial covers but can be shown to be philatelic.
Addressees can give away the philatelic nature of a cover.
Another clue is the appearance on cover of a stamp sold only in sets at the post office. Many of the overprinted stamps fall into this category. An overprinted 2 Scott No. 65 on cover, for example, is certainly philatelic because it was issued in a small quantity and only in a set to collectors. Click here for images of Philatelic Covers. All rights reserved.