440i ( 1001690 ) and 440iHV ( 1001691 ) Back Plate
Bare Housing Back Plate Only. Obsolete Item. - As of August 11th, 2021 - NONE left in stock
Timer Assembly can be replaced with the complete new 460TC we sell.
It will fit on all Autotrol 155, 163, 168, and most 255, 263, and 268 valves.