25 May 2006, 23:49
The calculator modules came in two versions, the 901 and 902. The 901 was earlier, and did not have the Auto-Command feature. It also required an additional button-press to display running seconds, rather than simply keeping the button down for more than 1.25 seconds. Activating the calculator on the 901 was done by pressing the "0" key. The 902 had Auto-Command, and the calculator was switched on by the "+" key. Both versions are Auto-Set. The watches can be distinguished by checking the lower right button on the keyboard; "C" = 901, and "=" = 902. In both, time is displayed by pressing the "Pulsar" button. Multiple presses of the "S" button allow independant setting of the hour, minute, date, etc.