These letter scales were used to determine postal rates according to weight. It's interesting to note that the postage rates were stamped in brass leading one to believe that rates were fairly stable.

Stamps.com offers a free USB scale when you sign up for their service. The first versions of this scale did not have a display. In order to find the weight of an object the scale had to be ...

WASHINGTON (AP) — The U.S. Postal Service is seeking a rate increase this summer that includes hiking the cost of a first-class stamp from 73 cents to 78 cents. The request was made Wednesday to ...