Abstract: In mail-weighing machines the values determined by a weight measuring device (20) are supplied in digital form to a programmable set-value store (27). The set-value store (27) and the codifier (23) supplying the digital, measured values are connected to the display device (24) via a first multiplexer (26) which alternatively supplies to the display device (24) the output signal (25) of the codifier (23) or that of the set-value store (27). In a manually-actuable selector device (38), different postage tariffs can be set which conform to different groups of addresses of the set-value store. The output of the first multiplexer (26) is one input to a second multiplexer (31). A time clock (32) or other source of information is connected to the other input of the second multiplexer (31).