output q of flip flop 33 applied thereto the code of the seconds signals 41 is the same as used with the dates signals 42 such that the decoder 45 serves for display of both seconds and dates functions in this way actuation of the pull push switch s1 changes the display mode alternately between a seconds display and a dates display the rotary switch s2 is not rotated during these operations an embodiment wherein the seconds display is reset to zero is now described in fig5 a divider 46 applies 1 second signals to a seconds counter 47 the seconds counter 47 counts 60 seconds and then applies a 1 minute signal to a minutes counter 49 through an or gate 48 the minutes counter 49 counts the minute signals up to 60 minutes and then applies an hour signal to an hours counter 50 a time correcting circuit 51 similar to the circuit 15 of fig1 receives an input signal 53 from the rotary switch s2 and transmits a time correcting signal to the minutes counter 49 through the or gate 48 this input signal 53 is the output signal from the antichatter circuit 7 of fig1 when a time correction is not to be performed that is there is no input signal from the rotary switch s2 the differential signal generated by the nor gate 10 when the pull push switch s1 is actuated is inhibited at the and gate 11 the and gate 11 output is low because the output q of the latch 9 is low the output signal of the and gate 11 is represented.