Currently, the number of solo uses of the 14¢ sheet stamp on business reply mail requiring payment of postage plus 1¢ per piece is: 1. 

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Description: Envelope on top of stack of business reply mail sent to Chicago, Illinois. 14¢ made up of two pieces at 3¢ postage, two pieces at 2¢ postage and 4¢ for the four pieces.

Owner/Source: Bob Hohertz website.

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