Choose a used timer from this list: All in good working order.
Arlec PC 844, rotary dial with one ON clip and one OFF clip
Arlec PC 727, rotary dial with many built-in ON-OFF push knobs
Plugz PMTI, rotary dial with one ON clip and one OFF clip
Kambrook KD 36, electronic programmable timer
Kambrook KD 44, rotary dial with one ON clip and one OFF clip
Kambrook KD 86, electronic programmable timer