Diehl Time Clock TA4073 Digital, electromechanical & quartz timers Diehl 7 Day hot tub time clock. Diehl 800 series electromechanical time clock TA4073 is a 120V, 15amp panel mount timer for bath, whirlpool, spa and hot tub controls (and other uses too!). 4 terminal tabs on the bottom on this SPST timer. 7-Day timer has 12 tabs for each day, Monday thru Sunday, 2 hours per tab. Gray colored bezel behind timer dial.
