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62. Gum varieties: At one end of the spectrum in this category is partially missing gum, which has correspondingly little value. On the other end are gum inclusions, or tiny objects, such as hairs or insects, that get stuck in the gum or under the gum as it is applied. The more interesting the inclusion, the greater the value.
Type 62: A fly was caught on the gum of this block (Scott 976) during the production process. This was in the era when the Bureau of Engraving and Printing had no air conditioning, so during the summer the windows were open and anything might fly in.
Type 62: A vertical gum skip leaves a small ungummed line (Scott 995).
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