mail cancellations

When did the postmark on our letters go missing? By postmark, I refer to the round circle that once included the date, time of receipt and location of the post office. Generally, the circle was stamped to the left of the cancellation, those wavy or straight lines that partially cover the stamp(s) to indicate that the stamp has been used. I was reminded of this absence recently by the marketing efforts of a certain coffee company promoting a new first edition blend, using a version of the classic circle. Although our first class, stamped mail still…