When the call finishes, re-insert the same ticket and pull the right lever . This prints the elapsed time—calculated automatically by the machine—on the card [3].
. Below is a synthesized paper covering the historical context, mechanical operation, and maintenance procedures based on extant technical data and historical records. Calculagraph Model 6 : A Technical Overview I. Historical Significance cal6b calculagraph manual
Press the TIME button; the first display will flash, indicating it is ready for adjustment. When the call finishes, re-insert the same ticket